My Sister and I - Incest/Taboo

Have you ever gazed lustfully at someone you shouldn't? I bet you have. And, have you ever said or done something on impulse that has forever altered your life? I bet the answer to that is yes too. I did both, and this is the result.

I'm Shaun, I'm eighteen, dark haired, fit, though I say it myself, and a bit of a biker. Actually I'm classic motorbike mad, riding around on an old 650cc Triumph Tiger 110. Never heard of it? Then, man, you've never lived. It's a British vertical twin from the early sixties, and it's pure highway music when you open her up. It's not very fast by today's standards, and its road holding is shit - hence this story - but it still turns heads and I wouldn't swap it for the world.

The trouble is that narrow tyres and wet leaves are not a good combination, and they earned me a broken right wrist when the old bird slid from under me. Fortunately I'm left handed, but it did mean that I couldn't either twist the throttle or lean on my clip-ons, and my Friday nights out with fellow classic bikers came to a sudden, albeit temporary, end. It also meant that I was at home when I would normally have been out.

Friday evening is always a strange evening at our house. Dad invariably spends the entire evening in his workshop doing god knows what, and Mum is always out at her amateur dramatics rehearsals (rumour has it that they'll actually get to perform a play this Christmas), while my dearly beloved older sister, Tasmin, usually cooks the tea. She says she doesn't mind because it gives her the chance to experiment in Mum's sacred kitchen, but I've always believed that she also uses the opportunity to bring a boyfriend around for the evening, because she regularly has a dreamy and satisfied smile on her face when I come home.

Tasmin is two years older than me but has the same dark good looks and, in her case, a figure to die for. She's tall, nearly as tall as our father, and slim, but has curves just where you want curves to be, and she's never short of male attention. In fact I almost feel jealous of her achievements with the opposite sex. But then, I suppose that if I spent less time covered in oil and going on about gear ratios and high compression pistons, maybe I'd have similar success.

Anyway, on this particular Friday evening I was sitting, supposedly watching the television but really half listening to Dad banging about outside and wondering what the hell he was doing, and half watching the grouchy look on my sister's face and thinking that the look confirmed my suspicions, that my presence was cramping her style.

As I watched her as she unconsciously folded her sulky arms and crossed her legs under a rather short, pleated, grey skirt, flashing a length of smooth white thigh topped by bright red panties in the process. Now, I've seen my sister in her undies, in a bikini, and even in the nude, though not recently, and I'd never thought about her as a sexual object until that moment. For some reason that quick flash got to me and I could feel my trouser snake perk up at the possibilities.

I also felt my face go red with embarrassment at thinking, even fleetingly, such forbidden thoughts. Maybe I was feeling sexually deprived, but I also felt instantly jealous of the person she had expected to be fucking that evening. Mentally I started beating myself up for thinking the unthinkable, but even that didn't stop my cock from yawning and stretching and getting ready for work, and I kept my eyes peeled for any more displays of sibling flesh.

I didn't have long to wait for soon she was fidgeting in her chair again, uncrossing her legs and slumping down without thinking, letting her little grey skirt ride up in the process so that the crotch of her panties became clearly visible. I stared at her nylon clad mound out of the corner of my eye, staring and wishing, – and denying to myself that I would ever dream of doing anything about it. My god, but she did look sexy, even the petulant pout on her mouth seemed to be calling me.

"What are you staring at?"

Her voice cut across my illicit reverie, making me dart guilty eyes up to her face.

"Me? Nothing really" I cleared my throat as a delaying tactic while I tried to come up with an acceptable answer. "Actually I was just wondering why you look so pissed off?"

"Because you being here has messed up my arrangements, that's why."

So I was right, and her remark gave me both the opening and the high moral ground.

"Got a shag lined up, had we?" I smiled gleefully. "Somebody lined up to visit, with everybody else out of the way?"

At first her eyes widened in alarm at my insight, but then she gave me a knowing look and a little grin.

"Now why would you think that?" She countered.

"Because you've shaved your legs - and because you look totally frustrated." I don't know why I said that last bit; it just sort of slipped out.

"Clever boy." She rolled her eyes to the ceiling.

Silence reigned for about half a minute or so.

"All right, yes, you have got in the way of my sex life, and yes, I am pissed off, and yes I'm feeling frustrated. So now go in another room and gloat where I don't have to see your smug face."

"Hey, now don't start on me; I didn't break my arm on purpose." I waved my cast at her to remind her why I was home. I grinned. "In any case, I can make a good guess at what you would be doing if nobody else was in the room."

"What would I be doing?" For a moment the penny didn't drop and she sat looking puzzled. There was a couple of seconds gap. "Oh! You dirty minded sod!"

A cushion came winging in my direction, her breasts bouncing under her white jumper from the effort. I ducked it with a chuckle.

"Well? Wouldn't you?"

"If I wanted to do that I'd go to my room, out of the way."

Here was where I spoke that life changing sentence.

"Well, let me know if you do and I'll give you a hand."

"What! You'll do what?" She stared at me blank faced and open mouthed, but more in surprise than anger.

I suppose I could have relied on the old standby and sworn blind I was only joking, but for some reason best known to myself – and I've no idea what – I didn't back off.

"I said that if you fancy giving yourself some finger fun, let me know and I'll give you a hand."

She sat looking at me in total disbelief, her mouth opening and closing as she tried and failed to come up with a reply. Eventually she swallowed and spoke.

"I don't think you would." She told me quietly. "I don't think you'd have the nerve."

I smiled. "Appearances can be deceptive you know."

"I don't think so." She replied slowly. "If I was busy playing 'squelch' and you came in, then I reckon you'd go red and run a mile.

"Try me." I challenged her, my mouth suddenly going dry at the risk I was taking."

There was another of those famous pregnant pauses before she answered.

"You know." She began, as if speaking to nobody in particular. "I think I'm going to my room for a lie down. I won't bother locking my door because I don't think anyone will bother me, do you? Especially not someone with a plaster cast on their right hand."

It was both a very obvious challenge and an easily deniable invitation.

"They might." I told her, smiling. "Especially if they're left-handed."

For a moment that took her aback. She had completely forgotten. She hesitated and then inclined her head in mock defeat.

"I still don't think you would." She told me, uncoiling her long legs and pushing herself from the chair.

"We'll see." I told her, my breathing beginning to betray me.

"Won't we just." She shot back over her shoulder as she disappeared through the door.

When she had gone the reality of the conversation hit me and I sat there dry mouthed and actually shaking, frightened of doing anything, but even more scared of not doing. I knew my sister, if I failed her challenge she would tease me mercilessly, no doubt putting it about that I'd been too chicken to take on a dare, but without mentioning her part. But if I did go to her and I'd made a mistake, and the offer wasn't actually on the table, what then? What if our Dad came in from his workshop at just the wrong moment, what then?

The door from the living room was still open, and when I heard her flop down on her bed with a sigh I knew that she'd deliberately left her bedroom door open too. What was I to do? Was this for real or was it a set up? I had to do something.

I can honestly say that as I crept through the living room door to stand listening at the end of the hall, my legs were trembling and my breathing was rapid and shallow. I was so turned on, and so scared. I mean, this wasn't just any girl that I was thinking about, a girl that I could laugh off if I'd made a mistake, this was my sister, my own flesh and blood and a surefire exit from the family home if I'd got things wrong. Even so, the sheer thought of such forbidden fruit had my cock pushing at my fly, desperate for freedom.

I stood there trying to control my breathing, to hold my excited breath and listen for the slightest noise from her room. Just the merest sigh or groan, that's all I needed, or even a tiny rhythmical movement of the mattress and I'd know that she wasn't just laying in wait for me, fully dressed and grinning wolfishly to herself at my teenage gullibility. But there was only silence and I still didn't know. The only noise was the reassuring whine of a power tool from the workshop, telling me that Dad, at least, was doing what was expected of him.

I made my way slowly, carefully, anxiously, towards her door, my eyes wide with foreboding, my tongue licking at dry lips and my trembling hand sliding quietly along the wall.

Her door was halfway open, and as I carefully approached I could see the bottom part of her bed. For a moment the visible part of her bed appeared empty and I thought that she wasn't there, the notion flooding me with mixed relief and disappointment, but as I got closer I could just see the foot and ankle of a drawn back leg, a leg that was betraying the small rhythmical movements of masturbation. A picture of her naked and playing with herself fixed itself into my mind and my cock twitched again. I stood at her open door, watching that leg and trying to pluck up the courage for that 'this is it' moment when I walked into her room.

How long I stood there imagining the erotic scene I'm not sure. It wasn't long but it seemed like ages, all the time watching that ankle flexing and knowing that if I left it too long then she would have finished and my chance would be gone. In the end I chickened and decided on a different strategy, one that left me and 'out' if things went wrong, or so I believed. Instead of walking boldly into her bedroom I put my hand out, waving it past the edge of the door so that she couldn't help but see it and know that I was there.

"Here's the hand I promised you, if you still want it?"

That way I believed I was putting the onus on Tasmin. She would have to reply without my having committed myself too fully to withdraw. But that wasn't quite how it worked out.

"Stop messing about and get your arse in here."

With that the foot suddenly disappeared and a hand snaked out to wrap itself around my wrist and haul me, surprised and off balance, into her room.

"If you're going to creep up on someone, don't slide along the wall, I heard you coming all the way."

She was sprawled on the bed, half propped against the headboard, but not naked as I had supposed. In fact she was still fully dressed with her free hand lying innocently by her side, and looking smugly pleased with herself. I felt confused, wondering if she'd been pretending to masturbate just to make me look stupid.

"Now, you didn't think I'd be lying here just waiting for you, did you?" She asked, one eyebrow raised. "I'm your sister, remember, and you know that brother and sister aren't supposed to do things like that."

"You made it pretty clear that you wanted me to." I reminded her.

"No, actually." Her face took on a hard look. "If you remember, I made it clear that I was going to my bedroom and I didn't expect to be disturbed."

I thought about it for a moment and then realised that her remarks could actually have been taken either way, and I was so bewildered that I was no longer sure which she had meant.

"Did you really think I was going to strip off and let you catch me with my hand between my legs, much less get you to help me do it?"

I was completely unable to answer her, I just stood there, eyes staring at the floor.

"Now go away little boy, come back when you're a man."

She spoke dismissively, as if both the episode and me were of little consequence, but then she looked up as if a thought had just occurred to her.

"You really would have done it, wouldn't you?" She continued. "You really wanted me to let you touch me, didn't you? I suppose you would have wanted to fuck me as well wouldn't you?" Her voice was getting louder and nastier all the time. "You are a nasty little pervert, that's what you are. Fancy expecting your sister to open her legs for you. Get out of my room, you slime." She pointed belligerently at the still open door. "Go on, fuck off."

I felt myself go white and I turned without a word. How could I have misjudged things so badly?

"Now get out and fucking well stay out, and think yourself lucky that I'm not going to tell our folks that you tried it on with me."

She was shouting now, and I was worried that our father might hear us, so I almost ran from her room, pulling the door shut behind me.

The next day or two were a bit tense as I half expected my folks to start into me for my supposed misdeeds, but they didn't and I finally began to relax. It seems that Tasmin had, at least, saved me that embarrassment. Even so, she didn't leave it alone altogether and kept rubbing my nose in it with snide comments and suggestive looks. Her last remark came when I eventually had my cast taken off, the event giving her the chance to ask, in front of our parents, if I intended exercising my fingers now they were free. They didn't understand what was to them an odd remark, and I just kept my head down and ignored her.

At least now I was able to get back on my bike and enjoy a ride out. It was good to get away from the place, leaving Tasmin free to pursue her clandestine sex life in peace.

It had already occurred to me to wonder why she didn't openly have a boyfriend, after all, she was easily old enough and our parents weren't prudes, and then one Friday evening I got to wondering why, and who this secret boyfriend might be. I decided to go back unexpectedly early and surprise them.

Our house is a bungalow, and rather a large sprawling one, set back from the roads and in its own grounds. There are quite a few bushes and small trees by the roadside and so it's not possible to see the actual building until you're part way up the drive.

Dad had already retired to his workshop before I left, so I returned about an hour or so later, figuring that was long enough for things to have begun if they were going to. Even so I hesitated at the gate, trying to convince myself that I should or shouldn't do what I intended. Eventually I parked the bike behind the shrubbery and set of up the drive, automatically walking as silently as I could even though it was my own home, pausing when I reached the bend that would give me first sight of the house.

I was immediately struck by how quiet and dark it all was. It seemed as if no one was home, with only the porch light and the one glowing faintly from the hall showing that there was even a building there. I stood watching and wondering for a minute or so, trying to figure out if that's how it should look normally or if it was unnaturally quiet. Perhaps it was simply that everyone had gone out, but somehow I didn't think so. I wasn't sure what, but something was bothering me. I stepped to the side and walked on the grass instead of the drive, still instinctively trying to keep my approach silent.

I got close to the house, keeping well to the side, hearing and seeing nothing; even my father's workshop was now silent and dark. Now I had to make a choice, and I'd not thought it through. Should I enter boldly through the front door and see who I could flush out, with all its potential for embarrassment? Or should I creep around the outside and listen at my sister's window to see if I could figure out who she was with that way? I chose the latter.

Tasmin had always been very careful about drawing her curtains ever since we moved into the bungalow and had bedrooms on the ground floor, so I hadn't expected there to be any gaps. But this time there was. Not much of a gap, just a small triangle of light where the curtains hadn't quite come together at the bottom, but it was a gap nonetheless. I hurried forward, breathing excitedly at this unexpected but welcome development.

The view I got was tiny and incomplete, but it was enough. By standing and looking through the gap diagonally I was able to see that there were two apparently naked people on the bed, a girl, presumably Tasmin, who was lying on her back with her legs apart, and a man lying between them. I was just able to see the top of her legs and her pussy, or at least, I could when the man pulled back in readiness for the next stroke. Then I could see his cock penetrating her, pushing in and out like a piston, withdrawing into view and then disappearing into her hole and behind his body as he plunged forward. God, it was quite a turn on to watch my sister being fucked by this mysterious boyfriend.

I must admit that this was the first time I'd ever watched anyone being fucked, or doing the fucking for that matter, and I stood there absolutely fascinated, my own cock growing by the second. He, whoever 'he' was, didn't seem to be in any particular hurry, he just kept up the same slow relentless rhythm even though I could hear Tasmin's pre-orgasmic shouts through the double glazing. She was bucking under him as if to hurry him along, but he just kept going, in and out, in and out, until her orgasm was over and she lay passively beneath him.

By now my hand had automatically unzipped my flies and I had started wanking, steadily, in time to his movements. You can have no idea how randy it was making me feel seeing my own sister getting fucked, and how much my heart was pounding as I watched and furtively played with myself. I think part of the thrill was the very fact that they had no idea I was there, no idea that someone was spying on them.

I don't know what made me do it, but as I watched and wanked I felt for my 'phone with my free hand and took a couple of quick photos, poor shots though they were through such a tiny gap and with such low light levels. I think at the time I had some idea of using them for wanking fodder later on, but in the end I found a better use for them.

Her partner slowly began to speed up, and so did I, my hand keeping pace with his thrusts. She was beginning to react again, turned on again by the relentless fucking she was receiving, her hips moving up to meet his and letting their bodies slam together. It was a wonderful sight, especially as they got quicker and quicker, driven on by developing orgasms. I was just beginning to feel that I could cum to, and I wondered for the moment if we might all cum together, but it was not to be, they were both well ahead of me in that department.

The first to cum was Tasmin's anonymous lover, ramming himself into her with a roar that was audible out here in the garden, and then grinding himself deeper within her pussy as he let fly his load. That did it for Tasmin and she came for the second time, uttering the same unintelligible shouts of pleasure that mixed with his in pure delight. I could see that her legs looked to be locked around his back to hold him into her, her thighs flexing and moving in unison with his pounding cock. I was getting closer myself, feeling that beautiful pressure building inside my balls as I watched them slow and eventually collapse together as their orgasms past.

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By now I was leaning with one hand against the wall and wanking frantically with the other, expecting to shoot my load up against the wall but at the same time guiltily half wishing that I was shooting into Tasmin instead of her lover.

I was nearly there, so close that my leg muscles were beginning to quiver as I stood slack mouthed and trembling, overwhelmed by the sensation of my spunk building up to it's eruption and teetering on the very edge of a climax, when Tasmin's lover moved, climbing from her and letting me see his face for the first time.

It was my Dad, my father, her father, and our own flesh and blood who had been fucking his daughter in her bedroom that night – and no doubt the other nights as well. No wonder she smiled when I asked her about her boyfriend. It was too late to prevent myself from cumming, but my hand froze with the shock and I stood there with my spunk spurting and dribbling from my cock under its own pressure, splashing against the wall and running down my fingers. I was open-mouthed with disbelief and as my climax quickly faded and that usual leg trembling lethargy stole over me, I just sank down slumped against the wall, appalled with what I had seen and angry with myself for having masturbated over it. The stupid thing is that I felt betrayed; she had turned me down, even as a masturbation aid, and then fucked our father. That hurt.

But at least now I knew who her lover was, and now I had to decide what to do with that knowledge. Should I tell them that I knew? Should I tell my mother? Or should I just keep quiet and hope to spy on them again. I was instantly disgusted with myself for thinking such a thought, but I had to acknowledge its attraction. I had also to acknowledge the jealousy that I felt for my father, because, like it or not, I would very much have liked to be the one fucking my sister. I sat there, my back against the wall, for quite a long time, until I heard my father coming out of the house and returning to his workshop, no doubt intending for everything to look normal for when his wife, my mother, returned from her rehearsal. Poor deceived woman that she was.

I sat there for a while longer, my flaccid cock still hanging disconsolately out of my fly, trying to get my head around what I'd seen and trying to figure out just what to do. Then, abruptly, I made my decision, I would tell our mother what was happening and to hell with the consequences. I rose quietly, tucked myself away, and then silently made my way back towards the gate and my bike, full of a mix of vengeance and good intentions.

But the day had not yet finished with me, it had one more surprise in store as I got round the bend in the drive. There, just inside the gate and out of sight of the house, and about opposite the bushes that I had hidden my bike behind, there was parked a car. It was a car I recognised as belonging to Bill Prior, the director of whatever play it was my mother had a part in, someone who had often dropped her back home after rehearsals but who, as far as I knew, had never had reason to park just inside out grounds. Now, I'd been out in the dark for some considerable time, and my night vision was pretty well attuned, and so I could see that there were two figures in the front seat, my mother and Bill.

I remember thinking to myself that at least it wasn't the back seat, but as I crept noiselessly towards them I could see that this made little difference. I don't mean they were shagging or anything, but nor were they chatting innocently. They were obviously embracing and kissing passionately and, as I got closer, it was clear that my mother's top and bra were pushed up and his hand was cupped around her breast, rolling her nipple between his fingers. Strangely, the thing that bothered me most was the fact that she had her hand placed over his in mute encouragement. What the fuck was wrong with my family? Why was I the only one not engaged in any kind of illicit hanky-panky?

I slipped between the bushes and stood watching, feeling my cock responding automatically to the sight of two people petting and kissing in a car, even though part of me felt the same revulsion as when I'd spied on my sister such a short time previously At least it was fair, I supposed, because now both female family members had given me a hard on, but this time I did manage to restrain myself from wanking over the sight.

Just as with Tasmin, I'd never really thought of my mother as a sexual being, even though my very existence proved that she was, and to see her sitting in the darkness of the parked car apparently enjoying the attentions of a man other than my father was very strange. In a way I was glad because of what I knew my father was doing with my sister, but it still seemed wrong, almost as wrong as what I'd witnessed earlier. I didn't know what to do, and so I did nothing and just watched the pair kiss and cuddle in the darkness.

I will say one thing. When Bill pushed her clothes even higher out of the way, I could see that she had surprisingly high breasts for a forty-something lady, with long dark nipples and a lovely bounce. It was weird, but I actually felt proud that she was my sexy mother.

He leaned over to take her nipple into his mouth and his hand moved downwards out of sight. I couldn't see, but I had a good idea what he was doing. My mother closed her eyes and leaned her head back, obviously enjoying his mouth sucking at her breast and his hand playing with her pussy.

I just watched from the safety of the shrubbery, fully engrossed but this time with no urge to masturbate. Nor did I think of taking any more photos, not that the available light would have let me. In the car Bill was sucking heavily on my mother's nipple, pulling on it and worrying it like a dog with a toy, his hand out of sight but his shoulder moving rhythmically to show how he was fingering her. She, in turn, lay back with a grimace of pleasure on her face, her eyes screwed shut and her teeth clamped over her bottom lip. Then, abruptly, she began to roll her head from side to side and her hand snaked up to rest on the back of Bill's head, pushing his mouth harder onto her breast. I could hear the muted sounds of her orgasm even where I stood, stronger and wilder than when I heard her with my father. Bizarrely, I was pleased that she enjoyed her illicit lover more than her incestuous husband. Serve him right.

After they had finished and Bill had driven my mother up to the door as if delivering her home in the normal way, I stood silently thinking. What was going through my mind was simply, 'what do I do now?' There was little point in snitching on Tasmin and our father, because our mother was just as guilty. The only thing I could think of at the time was to keep quiet and spy on all of them as often as I could and at least get some pleasure. At least that was my intention until Tasmin opened her mouth a couple of days later.

She'd been making spiteful remarks ever since that night when I'd been duped into going to her bedroom, but I'd tried to ignore them, not knowing about her own secret. This time we were on our own in the house again, our parents having gone to see a show, when she asked me if I'd like to watch her masturbate again.

"I'm going to my room." She told me. "I bet you'd love to know what I'm going to do, wouldn't you? You'd be a little boy learning from his big sister, wouldn't you?"

I'd had enough, and an idea for payback sprang into my mind.

"You mean you'd really let me watch you?" I asked innocently.

"Yes, I promise." She smiled seductively, thinking that I was walking into another trap. "You can watch everything I'm going to do."

"Go on then." I grinned inside.

She led the way to her bedroom, taking my hand as we entered and closing the door behind us.

"You sit there." She pointed to the bed. "And I'll get the ironing board out."

I feigned surprise. "You're not doing your ironing, are you?"

"Oh yes, what did you think I was going to do?" She grinned in triumph.

"Well…" I let my voice trail off.

"You didn't think I was going to play with myself, did you?"

She was almost beside herself with malicious glee. It was time to spring a surprise of my own.

"There's something I think you ought to see." I told her, taking my 'phone out.

Her face clouded with doubt at this unexpected turn.

"You see." I told her, savouring the moment. "Last Friday I saw something interesting." I selected the first photo and held it out to her. Her hand flew to her mouth and she sat down beside me on the bed with a thump as she saw the picture and realisation struck.

"This is just the first shot out of a series." I exaggerated a little there, after all the series was only two, but she didn't know that. "How do you think Mum would react if she saw who her little girl was shagging?"

"Oh fuck." Those two whispered words told me that at last I had the upper hand, and I was now determined to play it to the full.

"Now, you did imply that you were going to let me see you play with yourself, didn't you."

She looked at me dumbly.

"Or would you like me to get so bored that I showed this phone to our dear mother?"

The implications were plain.

"Don't force me." She pleaded. "Dad made me do it with him."

I just smiled. "And made you enjoy it too? Do you think Mum would see it that way? Don't worry, it's only just once, I won't ask again."

Her shoulders slumped and she sighed her defeat. "When?"

"Now's as good a time as any."

"What do you want me to do?"

"Whatever you usually do to make yourself cum, so long as it's without any clothes on." I stood up and sat on her dressing stool to give her room. "But don't fake it, 'cos I'll know."

The look she gave me was a cross between hatred and embarrassment, but then she turned her back and began slowly to undress.

"How am I supposed to make myself climax with you watching?" She asked suddenly over her shoulder as she unclipped her bra.

"Well." I told her. "I suppose it might take a bit longer, but I'm sure you'll make it. Just close your eyes and pretend it's somebody else – like Dad, for instance."

"Bastard."

She lifted one foot after the other to slip her panties off, showing me her firm and well shaped backside, and then stood facing away from me as if gathering her nerve.

"Don't make me." She begged me in a little girl's voice.

"Why not? You pretended to offer it before, remember?"

She sat slowly on the bed and then, with a quick glance at me, she swivelled around to lie full length, her legs together and her hands cupped over her pubes. I just stood and waited. For the moment it was nice enough to gaze at her lovely ripe breasts with their long dark nipples. Eventually she decided that she couldn't stay like that forever, and so she parted her legs just enough to slide one hand between them to cover her pussy.

"Carry on." I prompted her, eager now to see her doing it, my cock swelling and thickening in anticipation.

Her middle finger began uncertainly to massage her clit, but after a moment or two she stopped again.

"I can't Shaun, don't make me."

"I bet you can really." I told her.

I moved around a little until I was opposite the bottom of the bed, and then leaned my behind on a chest of drawers and looked up between her legs, clearly waiting for her to continue.

"Fuck you!"

"Actually." I pointed out. "I'm the wrong generation. But I might be persuaded."

I didn't really mean that, but it added to my sense of control.

"You shit-headed pervert." She spat the words out, but at the same time she began once more to rub her fingertips over her clit.

Even though her knees were by no means wide apart I still had a pretty good view, and it was obvious that she was not at all turned on. Her pussy was no more than a closed slit with her fingertip pushing between the edges, but that didn't bother me at all. In fact, if anything the fact that I was making her do something so intimate against her will gave me a certain strange of satisfaction. It was about time I got one over on her.

"What's it like, shagging your father? Is he good, or do you just like to keep it in the family?" I taunted her.

"He's better than you'd be." She shot back.

"Do you want to check that out?" I asked with a smile. Once again I had no intention of following through, but I enjoyed winding her up.

"You fucking wanker."

"Actually, I'm not – but you are. And while we're on the subject, how about spreading those legs a little? Then you can do more and I can see more."

She shot me a venomous look, but she did open her legs wide enough for me to see all she'd got, and for her to begin rubbing herself rapidly from side to side. It was a turn on to see her labia, covered in black curly hair, parting slightly as she moved, giving me a glimpse of her pussy folds. I was now sporting a raging hard-on, and my hand went to it automatically, stroking it through my jeans.

For several minutes she stared straight into my eyes as she played, as if trying to face me down, and for those same minutes I looked back at her with an amused smirk deliberately plastered across my face, dividing my gaze between her face and her pussy. It was a kind of stalemate, Tasmin touching herself and staring at me while I rubbed my cock through my jeans and stared straight back.

Then there was subtle but definite change. Tasmin's free hand moved up to her breast, mauling the soft fullness and squeezing her nipple into a peak. At the same time her thighs drifted wider and her labia began to take on the puffy look of arousal. It looked as if Tasmin was beginning to get turned on.

"Well?" I repeated my question. "Is he good?"

"Yes." This time she didn't hesitate or try to deny it. "Yes, he is."

"So how long have you two been at it?"

"For about the last nine months."

Her arousal was now becoming obvious. She was gripping her breast firmer, pulling it out and then pressing it down against her chest as she massaged it. At the same time she had now trapped her clit between two fingers and was rubbing it with much more intent.

"You bastard, you're getting me going." She spoke quietly but fiercely, as if hating every syllable.

She was doing much the same for me; my cock was rock hard and very uncomfortable confined in my jeans. I needed a wank as much as she did.

"Then let's make it a joint effort." I kicked off my loafers and unzipped my jeans, hearing Tasmin's breath come out in a hiss as she realised what I was doing.

"No touching!" She warned me as I stepped out of my boxers and pulled my tee-shirt over my head.

"No touching each other." I agreed, leaning back on the chest once more and feeling the smooth wood against my naked bottom.

She raised her legs, surrendering to her urges and letting me see how wet her pussy was becoming. I smiled and then wrapped my hand around my shaft and began a slow wank, my eyes still pinned to Tasmin's pussy and the two fingers now delving into her slit. She looked at me, her gaze giving me a buzz by fastening hungrily onto my cock. We watched each other wank in silence, our moving hands making the only noises, until we could each see that the other was getting close to cumming.

"I'm going to shoot my load all over you." I told her, seeing her eyes close as she savoured the prospect.

"Yes please, do it, especially on my face."

That was an exciting invitation that I hadn't expected, but I walked around the bed to stand beside the bed, my cock pointing at her face with my hand still running up and down my shaft and bringing me closer to satisfying her demand. My balls were tightening and the pressure was building, and I knew I was almost there. I put a knee on the bed and rested my free hand against the wall, leaning over to point my cock directly into her face.

"You're going to get the lot." I growled at her, my teeth clenched as my climax became inevitable.

"Go on then, spunk in my face." Her voice was tight with her arousal.

She turned her face to me and opened her mouth, waiting for me to cum, her fingers pumping in and out of her madly as she got closer and closer herself. The sight of my sister lying and masturbating, with her eyes closed, her mouth open and her tongue thrust out to taste my cum was enough for me. I groaned as I felt my cum race along my shaft, spurting from the end to splatter across her nose and cheeks before my second spurt found it's target and flooded over her tongue and into her mouth. She moaned deep in her throat as a third spurt, not quite as big, landed on top of the second, and then her hips bucked as she too reached her climax.

It was a wonderful sight, Tasmin, with her face covered in globs and strings of spunk and her bottom raised from the bed in response to her own fingers rammed deep inside her, was moaning in ecstasy as she licked and swallowed the cream that had landed on her tongue and in her mouth. It is not one I'm likely ever to forget, whatever life has in store for me in the future.

All too soon my climax was over and, with wobbly, trembling legs, I sat down with a thump on the bed beside my sister, my chest heaving and mouth dry, watching her still in the throes of orgasm. Her two fingers were thrust as deep into her pussy as they would go, but instead of thrusting in and out she was holding them there and twitching her hips against them with her bottom raised high off the bed. It seemed to me that she enjoyed being seen like that, for she had turned herself slightly towards me so that I could get a clearer view. So much for the 'don't make me' from earlier. Tasmin was getting pleasure from this as much as I was, and that was confirmed as far as I was concerned when her orgasm finally ended and she collapsed back onto the bed smiling up at me.

"Fuck, but you're a bastard for making me do that." She panted.

"Making you?" I queried, noticing that her fingers were still probing her pussy. "Is this the same 'making you' as when dad 'made you' fuck him?"

This time her grin was a little more rueful and she covered her embarrassment by reaching out for the tissues from the bedside table to wipe my cum from her face.

"My god!" She exclaimed as she blotted up my spunk. "That was a heavy fucking load, wasn't it?"

I hadn't thought of it like that, but maybe it was.

"Well, I do like to give my women a cunt full."

I know it was a bit over the top, but Tasmin giggled at my remark as she tossed her used tissues onto the floor beside the bed.

"Perhaps you do, but you don't need to worry about mine. That's already as soggy wet as it could get."

She was still twisted a bit to the side and I could see her shiny fingers plunging softly in and out of her very slippery hole as confirmation of her words. I wondered briefly quite how she had intended that remark to be taken, but dismissed the incestuous thought that came with it. To fuck Tasmin would be to lose my high moral ground.

"My god. "I'm still feeling so fucking horny." She announced, adding the question. "Why are you making me feel so horny?"

"I dunno." I shrugged. "Maybe you just like being 'made' to do or feel things."

I hindsight there was probably more truth in that than I realised.

"I can go again, if you want me to?"

She was still gently fingering herself, and who was I to stop her?

"Yeah, I'd like that."

It would also give me the chance to get my breath back.

I propped myself on one arm and gazed down at her, watching her fingers busy in her hole and a series of expressions flit across her face. It was clear that she was still very randy, her breathing betrayed as much, and the way she closed her eyes and bit her lip, opening them again to smile faintly up at me before pursing her lips to blow a sigh of enjoyment. Then, as her breathing became quicker and shallower, she bent her leg back and reached around to finger herself from under her leg. I wondered why for a moment, but she'd simply made room to use her other hand to play with her clit and I understood. She wanted to play with both her clit and her cunt, and again, who was I to argue?

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"So you like me to watch you after all?"

She didn't speak; she just nodded almost imperceptibly and smiled, a rueful little smile as if she didn't like admitting it. I stared openly at her pussy where both her hands were going at it ten to the dozen. Going like that it wouldn't be long before she came again, or so I thought.

She got close, so very close, her fingers flying over her clit were bringing her to the brink, but for some reason she couldn't quite get there. She had to abandon the idea of fingering herself at the same time, her jerking, twitching hips soon made that impossible, so she grabbed her breast with that hand and mauled it vigorously, pulling on her nipple and squeezing the soft flesh behind it so that her fingers sank into it. She gasped several times as if she were finally there, but it always seemed a false alarm.

"God, I'm so fucking close!" She grunted, explaining what I could already see.

"It looks good." I told her, gazing at the trickle of pussy juice exuding from her passage. "You'll make it."

She kept at it, her fingers flying over her clit, pushing the flaps of her labia out of shape, and then there came a time when the movements became more erratic, uncoordinated, and I took that as a sign that she was there, or nearly so.

"Fuck!" She gasped. "My fingers have cramp. I've got to stop."

"Use your other hand." I suggested, understanding at last.

"Don't be fucking stupid, I'm not ambidextrous."

Her movements were now sporadic and spasmodic, as if she no longer hand control of her fingers.

Suddenly a memory returned, and an evil grin spread through my mind.

"I offered to give you a hand once, but you turned me down. Shall I offer again?"

She looked at me in surprise, and then, after a moment's hesitation, removed her hand, leaving her sodden and swollen pussy exposed and defenceless. Again she didn't speak, but her nod this time was much more urgent and definite.

"You'll have to ask nicely." I told her. "My hand is still upset at being turned down last time."

The look of venom returned momentarily, but she just about did as I asked.

"Please!"

"Please what?"

"Please will you use your hand to help me out?"

"Help you out with what?" I couldn't resist rubbing it in.

"Will you please play with my clit and help me to cum?"

That was what I wanted to hear. 'Revenge is sweet' is one very true adage. I shifted my weight so that I could free the hand I rested on and reached down, running my fingertips through her thick bush until I could reach over her pubic mound to her clit. It did feel good. Her clit was quite large and very, very hard. Like an erect cock in miniature really, although you must appreciate that I'm not into erect cocks - other than my own, of course.

It was the strangest feeling to be playing with my sister's clit. I'd played with girls before, obviously, but none of them gave me quite the thrill that I got from touching Tasmin. It was probably the forbidden fruit syndrome, I guess, but to lie beside her with my hand between her legs and feeling her squirming from my attentions was on hell of a buzz.

She'd stopped touching herself, except for the hand that was kneading her breast, and she just kind of lay there and let me, her pelvis rotating a little and her bottom just lifting clear of the bed from time to time. She was very wet, very aroused, and I was surprised that she was so slow to cum. To be honest, I wasn't that bothered about bringing her off, I was just enjoying what I was doing. I mean, as soon as she came I'd have done my bit, and so I was making the most of my opportunity.

"That feels good. Please don't stop."

I had no wish to stop, but I wasn't going to let that get in the way of a tease.

"You'll have to be nice to me, if you want me to keep going."

I think she thought I was going to ask her to suck me, or something like that, because her eyes flicked from my face to my rapidly recovering cock and back again and a little frown sped across her face.

"What sort of nice?" Her hips came free of the bed and she gasped as she asked me.

"Say sorry for tricking me the last time."

Her eyes widened in surprise, but then I nipped her clit between two fingers and she closed them again and groaned with pleasure.

"Go on, say sorry." I started rubbing hard and rapidly at her clit again, and I could tell it was having an effect. "Or I'll stop."

"I'm sorry Shaun, honestly, but please don't stop because I'm going to cum soon." She sounded more panicky than sorry, but I let it go.

"And you'll remember who to ask the next time you 'need a hand' won't you?" That was something I hadn't intended to add, but it seemed the right thing to say at the time.

"Yes, yes, I promise." Her hips were now raised from the bed and her pelvis was jerking gently against my fingers. Apparently it was the right thing to say at the time.

I stopped talking at concentrated on strumming at her clit to make her cum, my fingers flying over her clit, with my palm clamped over her pubic bone to prevent it being dislodged by her intermittent jerks and gyrations. Her eyes were now closed, but her mouth was open and the tip of her tongue was flicking over her lips. She was very, very close, and it didn't take long before a sudden 'oh' escaped her lips and her pelvis shuddered.

"God, I'm cumming!"

She sounded surprised, but the only surprise to me was the power of the orgasm that promptly overwhelmed her. She now grabbed a breast in each hand and squeezed them hard, digging her fingers right into them, while at the same time her lifted her back and bottom clear of the bed so that only her feet and shoulders were in contact with the mattress, pushing herself hard against my fingers as she did so. From her mouth came a series of inarticulate little exclamations that built in frequency and volume until she was crying out loudly and continuously, totally out of control.

When it had finished she slumped back to the bed, gasping and trembling, shuddering with little aftershocks and rolling her head from side to side. Slowly she regained her bearings and her eyes focused, looking at me with a satisfied little smile on her face.

"Thank you." She whispered, and she obviously meant it too.

I nodded and smiled back, sitting up a little and taking my hand from between her legs. "Anything to oblige my sister." I told her.

She smiled again at that, and we both lay quietly on the bed naked for a little while, both of us thinking over what had happened and its implications, and the biggest question that we had to answer was simply this, were we likely to take that last logical step? We were both shooting little glances at each other as if trying to weigh up each other's thoughts.

"Shall we do it?" Tasmin asked me finally.

She was gazing at my erection with that sort of look on her face, but I would have immediately known what she meant in any case. I must admit that I had some reservations, both about sex with my sister and about going where my father had been, and for some reason shagging the same pussy as my father did seemed somehow more 'wrong' than fucking my sister. But I was eighteen and at that age when your cock is hard your head is soft - so guess what I said?

"Whenever you're ready."

"I'm ready."

We still hesitated for a minute or so, looking at each other, just making sure we were both cool with it I suppose, and then she shuffled away a little to open her legs and spread her arms in welcome.

"Come on, then."

I rolled towards her, lifting myself over one outstretched legs and settling myself between her thighs, the head of my cock just touching her somewhere very close to her pussy. She sighed in satisfaction and reached down to guide me in, spreading and raising her legs to make it possible. It was strange to feel Tasmin touching me, pulling me towards her and then directing my cock to her entrance. I couldn't help but wonder if she'd guided our father into her in just the same way, wriggling when his cock found her hole to make sure it was aimed correctly. She did that to me, accompanied by another of her sighs, and then pushed her pelvis at me, simultaneously pulling at my shoulders to make me enter her. I didn't need the persuasion; I was simply making sure I was penetrating before thrusting deep, and as soon as I felt my cock was in place I rammed it hard into her, making her gasp with pleasure.

"God, yes. Shove it up me."

I instinctively glanced across at the window and saw that same little triangular gap that I had spied through when my father was on this very same bed. I didn't expect that he'd be watching me doing his daughter, but I wouldn't have cared if he was. Maybe he'd find out how fuck her properly.

I smiled to myself almost wolfishly and set up a hard fast rhythm, plunging forcefully deep inside her. For some reason I needed Tasmin to know the difference between steady old father and vigorous young brother too. With every stroke she gasped into my ear as I pushed into her and gripped me hard as I pulled back. She wanted it this way as much as I did.

It wasn't long before I felt my balls begin to tighten with the beginnings of a climax - and only then did I think about contraception. I seemed to remember my father screwing her without a condom but, although I really didn't want to withdraw, I wanted to be sure.

"I'm going to cum." I grunted. "Are you safe?"

"Yes, the pill." She gripped me harder, locking her legs around my back. "Don't pull out, I'm cumming too."

We came together, me slamming myself at her while she shoved back up onto me, her legs still around my waist. It was a hard and bruising climax for each of us, Tasmin more particularly because she bit her lips quite badly as her orgasm hit her, but, god, it was worth it. I'm pretty sure that it was the thrill of a forbidden fuck that made it so powerful, but who the hell cared. I'd shot my load into my sister's pussy, and she'd enjoyed every second of it.

Afterwards we lay side by side again, but this time both of us were gasping and panting for breath, our bodies covered in that lovely light sheen of post-coital sweat. Neither of us said a word for several minutes as we attempted to get our heads around what we'd just done. Eventually, as before, it was Tasmin who spoke first.

"I'm not sorry, are you?"

"No."

How could I be sorry, I'd only done what my father had done before me, or was that just a justification?

"Shall we ever do it again?" She took my hand in hers as she said that, an affectionate act that I found a little disturbing.

"Probably." I was hedging my bets, I didn't want to be too deeply involved. "Let's see how we feel about it tomorrow."

"Yes, that's cool." She sounded disappointed. "But you won't tell anyone, will you?"

Why would I ever do that?

"No, I won't tell anyone about us, I promise."

"And you won't tell Mum about me and Dad, will you?"

"Not if you're good to me."

She wasn't sure what I meant, but assumed rightly that I was on about sex. She grinned broadly.

"Oh, I'll be good to you, I swear."

I smiled back without saying anything. She'd be good to me alright, I'd make sure of that. In my mind also was the thought that I needed to talk to our mother about her behaviour, because it had occurred to me that if my father was fucking my sister and my mother, then maybe I should fuck them both as well. That would be only fair after all. Let's see how open to persuasion Mum might be when she knew what I'd seen.