The next part I remember vividly. We were just fooling around, not long after Sherlock left, and I started feeling frisky.

I rolled myself on top of Mary and we were having a good old time, making out, grinding our pelvises together, getting turned on, when suddenly I decided to give it a try.

"You know," I said, rubbing up against her, "We could try that thing."

"What thing?" she asked with a playful smile. She'd been massaging my arse, grabbing at it, sliding her hands down the back of my pants. I knew she wanted it. She'd always been fascinated with my bum for whatever reason.

"You know," I said, "That thing."

She looked at me a moment, "Oh! That thing," she said excitedly. She grabbed my bottom roughly and dug her fingertips into my fleshy cheeks, "I never thought you'd actually go for it," she teased.

"Oh, shut up, before I go and change my mind."

Mary reached her hand under my pillow and withdrew the strap-on. I searched under my pillow to see what else she had been keeping under there.

"Take your clothes off," she said excitedly. She looked over the confounding straps and started trying to find which way was right side up. She quickly became frustrated with the apparatus, but every time I tried to show something to her, she batted my hand away.

I stripped down to my pants and waited for her to do the same, but instead she placed the strap on over her clothes.

"Aren't you going to get undressed?" I asked nervously, suddenly feeling very exposed.

"Feels weird," she said, shaking her hips back and forth, making her fake cock dance. I snorted a laugh and had to cover my mouth and close my eyes.

"Oh, my God," I laughed as my face turned a bright red.

"What? This doesn't turn you on?"

"I can't take you seriously when you wave it around like that," I explained.

"You boys and your toys," she chuckled, "This is kind of fun, makes me wish I was born with one."

It was then that I realized she was likely serious about it. Why else would she want to do such a thing?

"Okay, now what?" she asked as she crawled on top of me. I could feel the rubber dong sliding against my inner thigh, contrasted with her cotton pyjama bottoms brushing against my leg.

"Erm," I said, swallowing hard.

"Would you like to... touch it?" she offered with an award winning smile.

"Not really," I said, looking down at it.

"It's supposed to feel like the real thing."

I distinctly remembered it feeling like rubbery plastic and slightly squishy. Not at all like the 'real thing'. I've been handling my real thing all my life and know a great deal about what it is supposed to feel like and it did not.

"Yeah, but which is better the real thing," I said, pointing to myself, "Or that?"

Mary sat up on to her knees and looked down at it.

"I never really tried it out," she shrugged, "Do you think I should?"

"Uh," my brain flat-lined. She ripped off the strap-on, removed the dildo from its harness, and started shimmying out of her pyjama bottoms. She fell with a thud beside me on the bed and immediately started playing with herself.

"Hold this," she said, handing me it. She closed her eyes, bit her bottom lip, and played with her clit like an old arcade game, "Almost," she said. She opened her eyes and gave me a look, "You could help, you know?"

"How?" I croaked. It felt as if my whole throat had gone dry. I realized my mouth had been hanging wide open the whole time.

She spread her legs and simply said, "You owe me."

I licked my lips and tried to wet my mouth as best I could before going down on her. I don't mind it much, eating out, but it isn't my favourite thing to do. As a result, I'm not too good at it. It's not the taste; it's relatively tasteless to tell the truth, it's just... boring.

I'm a very visual person and with a face full of pussy, well, it doesn't do much for me. After only a few licks, Mary was pushing me away. I sat on my elbow, at her side, and watched intently as she pressed the head of the dildo to her entrance. At this point I was drooling. She let out a moan and the look on her face was worth a thousand words.

"How's it feel?" I asked.

"Oh, John. Call off the wedding. It's better than the real thing," she said breathlessly.

"Shut up," I said with a laugh, "May I?"

She gave up the reins and let me fiddle around with the toy inside of her. She started breathing heavily, with her mouth wide open, and making all sorts of small noises. I have to admit it was sort of fun.

We started kissing and I picked up the pace, moving it in and out. She really started enjoying it, as did I. She started moaning with her mouth pressed against mine, her lips were buzzing, her hips were squirming, her eyes were closed tight. She grabbed my bicep tightly and I drove it home, bringing her to a climax.

She let out a loud groan and went from rigid to limp in a matter of seconds.

"Phew," she sighed as I slowly removed the toy.

I twisted my wrist a few times and gave it a rub. It was a bit stiff, as were other things.

"Good?" I asked.

"The best," she said with a sigh of relief.

"Don't say that," I said with a pout.

She reached up and placed a hand on my cheek, "Yours will always be better."

"You don't normally get off."

"You don't normally last that long," she said, giving me a peck on the lips.

"Ta," I said, holding my breath. I was a bit offended.

"Your turn," she said, popping up and on to her knees.

"I really don't think-"

"I know," she interrupted with a smile, "Come on, you'll love it," she said trying to force me to lie down.

"Mary, I don't want it like this," I told her. She stopped pushing and let out a heavy sigh, "I'd like to be facing the other way."

"What?" she asked with wide eyes, as if all her dreams had come true in that moment.

"Just let me, prepare myself," I said, sliding off the bed, and heading for the en suite. I locked the door and sat on the toilet, with my head in my hands, rethinking my life's choices. I ran my hands down my face, rested them on my chin, and said a prayer.

I left the loo feeling weak in the knees. They threatened to buckle as I made way for the bed where my fiancée was waiting, strapped into her false manhood, with a tube of lube in one hand, and her dong in the other. She was stroking her fake self, making a mess of the sheets, dripping lubricant everywhere.

"They say you should use more than you think you should," Mary said in her defence as I looked disapprovingly at the spots on the bedspread.

"Who are they?"

"Internet," she shrugged, "Now bend over and let me have at it."

My arse tensed at her words.

"Kidding," she said, "Just... kidding."

I let go of my breath, not realizing I had been holding it in.

"Please don't kill me," I begged.

"Trust me," she said, grabbing me by my biceps, "I'm a nurse," she looked me over and couldn't stop smiling from ear to ear, "Have you been working out?" she said giving my arms a little squeeze.

"Oh, well, you know," I said, blushing. She gently pulled me on to the bed and drew me into a hug.

"So sexy," she said with a low growl.

"I try," I said with a chuckle.

"Now relax and let nurse take care of you."

"Ok," I said with a nervous squeak.

"Ok, what?"

"Ok, Mary?"

"I prefer ma'am," she teased, tapping me on the nose.

I laughed nervously, "Next you're going to be breaking out the riding crop," the look on her face scared me, "Tell me you don't have a riding crop."

"No, but I'm fairly sure Sherlock has a spare."

My arse tensed once more and I found it hard to breathe.

"Relax, John!" she laughed, "It'll hurt like mad if you keep puckering up like that."

"Be gentle with me," I begged.

"I promise," she said as she reached out. Her fingertips trickled down my chest down to my abdomen, and kept heading south until they just barely grazed this tip of my clothed cock, "Lay back. I'll give you a massage, just to get you nice and loose, and then we'll get started, ok?"

"Yes, ma'am," I said with a grin. She started by slowly working up my legs, massaging my calves, rubbing my thighs. It felt good and was working wonders on my nerves. Then she reached my groin and started rubbing my inner thighs. I love that most of all, it feels amazing.

She pulled off my pants and revealed my healthy hard-on. She worked it a bit, in her hand, before asking me to roll over on to my stomach. I was reluctant to let her stop, but when she started massaging my back, I felt all of my tensions fade away.

"You went into the wrong profession," I groaned.

"You want me doing this to other men?"

"Unh, no, don't stop."

Her hands went to my lower back, and I groaned as I sunk my forehead into the mattress.

"That feels amazing," I told her.

Then her hands ventured further down and on to my bum, cupping the cheeks. She rubbed softly at first, but then starting digging in with her fingertips.

"Here, lift up your hips," she said. I obliged and she slid a few pillows under me. She continued to fondle and caress my bottom until she asked, "Ready?"

I tensed up, "Ready for what?"

"Alright, Mr Watson, I'm going to touch you now, you might feel a bit of pressure," she said in her best physician's voice.

"Ha, ha, very fu...ck," I said as her two fingers breeched suddenly.

"Breathe," she told me. I held my head in my hands. It didn't hurt as bad as I thought it would, granted she used lube.

The stretch was uncomfortable, hard to get used to. I moved my hips around, trying to find a better spot, and she pressed in deeper.

"Tell me if it's too much, ok?" she asked as she bent her fingers.

"Jeeze, Jesus," I spat as she brushed against my prostate.

"Here, lift your hips up higher," I got on my knees and she removed a pillow from beneath me and grabbed my cock by the shaft. "Better?" she asked, stroking gently, "A little new, with something familiar?"

"Yeah," I said with a sigh of relief. The soft, affectionate touch, directed my attention away from the discomfort, and made it all more manageable.

She withdrew her fingers, gave me a firm slap on the ass, and told me to take over. She all but grabbed my hand and placed it on my cock. I gave myself a half-hearted wank, obeying her every command, hoping to God she wouldn't tear me a new one.

She squirted an exorbitant amount of lube on to the thing, applied a bit more to my arse, I said a prayer, and she lined her sights up for the kill.

As she was pressing it in slowly, I couldn't help but hold my breath and tense up.

"Relax," she reminded me, "Stroke yourself."

In an uncoordinated and feeble attempt to make things right once more, I touched myself as she eased herself slowly into my arse. I made noises I didn't know I was capable of, as a grown man. I gurgled and squeaked. I made a high pitched whine and spoke a foreign language that to this day I believe originated in the depths of the Amazon. I chanted some mystical charm and I may have even cried a bit.

Mary reached her hand under me and with her well lubed palm, gave me one hell of a hand-job. She started moving behind me, back and forth. I could feel the cold stretch, the strange sensation of being filled, and I pushed against her, wanting more.

She frequently stopped, had to change positions, and move her hands. I was becoming frustrated.

I tried tossing off myself, that didn't work. I started moving my hips back, grunting, and baring my teeth. She called me a "Pushy bottom."

Then I just had to stop.

My knees were aching, she was out of breath, and we were both completely spent. We were so knackered, we both curled up and fell asleep, not bothering to get redressed or to take off our new found friend.