Hermione left Luna to her thoughts for a while, still restrained in her bondage and desperate to masturbate. Watching to see when Luna was almost ready to come, Hermione quickly switched off the egg still pushed inside her friend's pussy leaving the white haired witch right on the edge without relief. Hermione smiled, then sat back in her chair to play with herself while she watched the struggling girl in front of her, before picking up a book and reading it for a bit. Every now and then she lifted her stockinged leg and dragged her heel carefully down Luna's chest, making sure to dig it into her perky nipples.

Luna sat there, the feeling of the egg still heavy in her pussy, tantalising her with the possibility of more pleasure but woodenly refusing. She thrust her crotch over and over, desperate to try and rub her pussy against anything, but left in desperation, thoughts and tastes of Hermione's piss still running through her.

Some time later Ginny's return home made enough noise to distract her Mistress from her reading. Ignoring her beloved redheaded slave for now, Hermione placed her book down, looked briefly at Luna and then walked over to her desk. The sudden noise startled Luna, her tired muscles straining once more against her tight bondage as she made another bout of squeals, her struggles and shrieks delighting Hermione's sadistic pleasure.

Lifting a small bottle from the table, Hermione popped the lid and inspected the contents. She had brewed up some polyjuice recently so this was still quite fresh, and with the addition of the final ingredient she dropped in it would be ready in less than a minute. She clicked the lid back closed as smoke began to gently seap out, then walked back to Luna.

"You've been a quite well-behaved toilet. But I think you need to learn that if you want to be one of my slaves, that your body belongs entirely to me. And that I can do anything with you or to you, whenever I desire. Let me show you."

Standing next to a frozen stiff Luna now, Hermione removed the bound girl's blindfold, and then the funnel from her mouth. Lifting the potion bottle to Luna's gagged lips, she carefully tipped the contents inside, then pinched Luna's nose until she gulped down the whole bottle. "Good girl, I like it when you take the whole thing for me. This might be a little uncomfortable, especially as you are still tied up, but that's a small price to pay for my happiness, isn't it?" Hermione giggled as she removed Luna's gag.

Luna stared up at Hermione in shock. She had no idea what she had just been forced to drink, and her jaw was still too tired and stretched from the gag to talk. She flexed her mouth a few times, scared despite her lustful desires and the rumbling feeling of the egg in her pussy. She opened her mouth to stretch again, then realised she couldn't close it again, and her tongue seemed to be growing too!

Hermione watched in amazement and curiosity as the potion took effect. She hadn't tested it before, and had no real idea what would happen next. Luna's body stretched and moved, the leather straps snapping in some places where her body grew, and now she could see Luna's head growing, her mouth opening wider and wider.

"I hope you don't mind," Hermione began, "but I'm going to invite Ginny in to meet you like this. How do you feel about that?"

Luna's eyes shot open wide, there was no way she could let little Ginny know about her perversions! She was so embarrassed every day that she couldn't stop thinking about Hermione, and her toilet, and what she would do in the morning while licking the porcelain… The thought that innocent Ginny could find out filled her with a blooming humiliation. She tried to shake her head as she looked at Hermione who was now just giggling at her, smiling as Luna struggled even more.

Hermione put her hand over her mouth, a little shocked at how well her potion had worked. And telling Luna about Ginny had obviously terrified the girl so much her hair had probably gone even more white! In fact her whole body had taken a white sheen now, a clean shine as her body kept transforming. Her lower jaw was now jutting forwards about 20cm and still growing, her teeth had vanished, and her top lip was now as big as her lower but was lifted upwards.

"Well now that's a look I think you can appreciate, Luna. You wanted to be my toilet, and now you really are!" Hermione stared down at Luna's transformed body, now an almost perfect replica of a Hogwarts toilet. The only differences were the leather straps arranged around the body and cistern where they hadn't snapped, and a series of moon-shaped crescents engraved over the body. Pink and white frills and lace began to sprout out of the top, folding neatly down the sides.

Cleaning up the broken items, which didn't include any of Luna's clothes as she had been completely naked, Hermione smiled broadly. She was overjoyed at how well her experimental polyjuice potion had worked, and as far as she knew it was the first time anybody had ever been transformed into an object rather than another person! The ideal potion for objectifying and humiliating people like Luna. She wondered briefly how long she could keep feeding her more polyjuice potion, whether she would be able to keep Luna permanently as a bathroom fixture, but decided it would be more fun to let her transform back for other kinds of play.

Flinging the door to her bedroom open, Hermione called out for Ginny before seating herself back in her Mistress throne. Running footsteps came stamping down the corridor before suddenly halting at the entrance.

"Please may I enter, Mistress Granger?" came a low, shy voice from the door.

"You may, slave. Enter quickly and kneel before me."

Luna watched, transfixed and motionless in the porcelain prison of her body as Ginny walked in. The young redhead stared briefly at the toilet, confused at it's appearance in Hermione's chamber but not uttering a word. She had a good idea why she had been called now.

"My pussy needs attention, slave, get your tongue busy." came Hermione's stern words, her hand cupping the back of Ginny's head and moving it into a more comfortable position between her legs.

Hermione stared at the Luna toilet, smiling as Ginny's tongue began its wonderful journey around her pussy. It was even better knowing how desperate Luna was to be in Ginny's position, forcing her to watch with jealousy as her friend's face was burrowed deep into Hermione's most intimate place, her beautiful red hair splaying out over her lap.

"I wanted to ask you some questions, my pretty slave, and then afterwards I have a task for you. What do you think about Luna? Do you find her pretty? What about attractive?" Hermione asked, eyes still staring at Luna.

Ginny slowed her tongue, thinking carefully about her answer. "I think she is very pretty, Mistress, although not as pretty as you. I love her frilly dresses, she told me they are called Lolita outfits from Japan, they are just wonderful. I'd love to be smothered in such delightful gowns, all that lace and silk must feel incredibly soft and sensuous. She dresses like a sissy girl, but I don't think she is interested in girls. At least she has never mentioned it."

"You forgot to tell me if you find her attractive. I think I can tell already though. Do you think she would enjoy kinky games such as ours? What would you think if she saw the things we do together? Would it turn you on for Luna to watch as I fucked your tight pussy with my strap on, or if I made her eat your pussy as I caned her backside? Maybe you would like her to tie you up and cover you in her frills, suffocate you in her lace?" Hermione watched carefully, studying Ginny's face as she made each suggestion, listening to her noises and her tongue movements as Hermione spoke.

Ginny slowed her tongue again, kissing Hermione on her pussy and then answered, "Yes Mistress I do find Luna attractive. I don't know if she would enjoy our games, I think she probably enjoys different things? I can only imagine the attention I would get from wearing dresses and shoes like hers, I am far too shy. I guess she enjoys the attention? Maybe she likes being humiliated in public, letting other people see how much of a slut she is, while also pretending to be all cute and virginal. The rumours…"

"Rumours?" Asked a suddenly very interested Hermione. "What rumours?"

"Well… I don't really want to gossip." Said the slightly blushing redhead in between little flicks of her tongue across Hermione's clitoris. "I heard that when the Durmstrang boys were here for the Quidditch Cup that she went back to their rooms after some of the matches and, um…" Ginny trailed off, suddenly focusing all her attention on her Mistress's pussy.

"And what?" Hermione demanded, relishing the story so much more knowing that Luna was right there and could hear the whole thing. She couldn't be sure, but the porcelain of Luna's toilet skin seemed to have taken on a slight pink tinge.

"One of the girls overheard the Durmstrang boys talking about it after. They said she got them to stand in a circle and she took turns sucking on their thingies, and using her hands to play with more thingies, until they, um, 'scored a goal on her face' is what they said."

Ginny's bright red face was now buried deep between Hermione's thighs, desperate to not make eye contact and hoping not to be asked more questions.

"My goodness, what a little slut that Luna is. If that's true, of course. I can't imagine how Luna must have looked with an entire Quidditch team's cum over her face. And all down her pretty dress too. Gosh."

Ginny said nothing as Hermione grinned, staring directly at Luna, imagining the sheer humiliation for Luna finding out in such an abrupt way that her best friends, and many more, knew about her whoring her way around an entire Quidditch team. Ginny's tongue made a sudden swirl, licking up from Hermione's pussy to her clitoris, prompting Hermione to grip the redhead between her thighs and ride a delicious orgasm, forcing Ginny deep into her pussy.

Relaxing her legs, Hermione pushed Ginny away from her, sighing in pleasure as she watched her lover lick her own lips clean of her Mistress's desire. "I think you might be able to guess my task for you, Ginny. I've had a new toilet installed in my room, which is so much more comfortable than the one in the bathroom. That is, it's more comfortable for me to watch you use it. How long has it been since I last gave you permission to cum?"

"Eight days Mistress. You used your strap-on to make me cum more than once after caning me for being bad and lewd."

"Ah I remember. Your delicious backside was such a perfect red from the caning that I couldn't stop fucking you. And the noises you made, those little yelps every time I thrust my cock inside you and my leather harness bashed into your cane marks. It was divine. I hope you learned your lesson."

A shy Ginny blushed once more as she remembered the repeated, forceful orgasms she had been given, such a short time after her punishment. "Yes Mistress. Thank you for my lesson Mistress. Thank you for helping me be a better person. I was reminded of your cane and your cock for days afterwards, every time I sat down, and they kept me away from temptation. Please may I have permission to use the toilet Mistress?"

"You may. You have been very good for not using the bathroom without my permission, so as a reward you may pee here, and then you may masturbate for me. I would like to watch you cum, but you only have three minutes from now. Off you go!" Hermione chuckled, watching as Ginny leaped up quickly, pulling her dress up as fast as she could.

Dropping her unsuspecting bottom down onto Luna's face and mouth, Ginny pulled her underwear down and began touching herself even before her pee started to flow. Luna had an incredible view, straight up from inside the bowl as Ginny's busy fingers sprayed her piss messily all over Luna's face. It had been a while since Ginny had been allowed to cum, and before the second minute was up she moaned her delight to Hermione, making the most of her allowance.

"You are such a very good girl Ginny." Stated Hermione, drawing a beaming smile from the orgasm drunk redhead. "You may leave now, and you can masturbate some more for me in your room. Off you go, my sweet."

Ginny quickly picked up her underwear and skirts and hurried out of the room, knowing her Mistress was unlikely to be so generous for long. It had been some time since she had last been allowed time out of her chastity spell.

Once the door was closed, Hermione turned to her toilet, flourished her wand and cancelled the polyjuice enchantment. She patiently waited, tapping her stiletto heel on the floor as Luna gradually transformed back to her normal self. After a minute or so of moaning, she was presented with a mewling pile surrounded by the remains of the leather straps.

"I hope you enjoyed your time as my toilet, slave. I have one last treat for you, as you have been such a good toilet!"

Luna, still recovering from her unexpected time as an actual toilet, moaned a little, and stirred. Barely raising her head, she saw Hermione indicating, pointing at the bed. The transformation had been a shock, but the idea of being Hermione's own personal toilet, installed in her bedroom, had almost driven her to insane levels of delirium, more than she could ever have dreamed of. She had felt so in place, the tight straps wrapped around her, holding her, and the cock Hermione had placed inside her only reinforced her feelings of submission to this beautiful and strong woman.

She had been terrified when Ginny walked in. It was one thing having your dream woman take you and use your body as her play thing, but it was quite another to have her younger friend see Luna in such a state. It took her more than a few moments of fright before she realised that Ginny wouldn't recognise her as a toilet, and instead got to listen to her talk to Hermione. She had called her Mistress! And the things that Hermione had her do shocked Luna! She still wasn't sure how she felt about having Ginny piss in her mouth, or watching her masturbate while sitting on Luna's face, but she couldn't deny being incredibly turned on the whole time.

Pulling herself up, the thought of denying this statuesque woman not even entering her mind, Luna crawled slowly toward the bed. Impatiently, Hermione tapped her foot on the floor before reaching down to the naked, piss covered wretch and lifting her bodily, throwing her on to the bed.

"I expect my orders to be obeyed quickly, toilet. Now turn over, lie down, face up and spread your whore legs for me. Your cunt should be available for use at all times." demanded Hermione as she fastened leather straps round her own legs, brandishing her strap-on cock, thrusting out obscenely in front of her. Luna took one look at the length and thickness and went white again, emitting a peep of fear.

Kneeling on the edge of the bed, Mistress Hermione Granger carefully pulled on a pair of thin latex gloves again, revelling in the tight rubber feel snapping to her fingers, then pushed Luna's legs further apart, giving her room to access the blonde fuzzed pussy now wet and waiting for her to dominate it. "I'm going to treat you like the fucking whore you are, Luna Lovepiss. Luna Lovecock. Luna Lovecum. I'm going to hurt you, I'm going to fuck you so hard you scream."

Gripping Luna's leg in her left hand, Hermione grasped the shaft of her cock and angled the head of it towards Luna's pussy. She slid the end up and down Luna's slit, pushing Luna's wetness around and over her cock, making it ready to slide in. Hermione looked up into Luna's eyes, holding her rigid penis ready. "Do you enjoy being my toilet slave? Do you want this forever?"

A dreamy-eyed Luna smiled up at Hermione and nodded. "Yes Mistress Hermione, I ache to belong to you, to take your piss in my mouth, to be used by you. I am yours to do with as you wish. Please hurt me for your pleasure, fuck me hard with your huge cock, make me scream."

"You will scream for me whore. I'll make sure of that. But that doesn't mean you have permission to cum, not yet any way." Hermione ran her latex-clad thumb up from Luna's pussy, the cum-slick rubber sliding around her sensitive clitoris, making her squeal once more.

"Do you swear to belong to me? Swear to serve and obey me?" Hermione recited the spell that Bellatrix had taught her, releasing Luna's ankle and picking up her wand. "Say yes and I will dominate your life for ever more. Your body and mind will be mine to do with as I wish. Say yes, and I will penetrate your body and soul!"

Luna could barely contain herself, Hermione's fingers on her clitoris and cock teasing at the entrance to her pussy, she begged "Yes! I want to be yours forever!"

Hermione swished her wand as she thrust her cock deep inside Luna's cunt, binding the witch to her forever. "You are mine now, whore. Your life is now dedicated to making me happy and doing my bidding. My first command while I fuck your slut hole is to tell me how many people have you had sex with?"

"Your beautiful and huge cock is the first cock I have had inside my pussy, Mistress. But I have sucked many penises, I'm not sure how many. At least ten. Oh yes, fuck me!" Luna asked, unable to hide anything from Hermione now, even her deepest secrets.

"Slut. What about women? Have you ever been with a woman before? Even a kiss?" Hermione demanded as she thrust her cock smoothly and repeatedly into Luna.

"I have never slept with a woman Mistress. You are the first to touch me down there. But I, oh wow I love your cock Mistress, have kissed a girl before, I kissed Belle during the Tri-Wizard Cup. It started innocent, but then she pushed her tongue into my mouth… ungh!"

Hermione was keeping up a steady rhythm now, engorging her own pleasure as she watched her cock plunge over and over into Luna's pussy, the ecstasy on Luna's face driving her to fuck harder and harder.

"You can tell me about that the next time I see you here, you filthy, cum-hungry whore! Now open your dirty mouth and look into my eyes." Hermione ordered, readying herself.

Luna's eyes, which had been half closed for a while, slowly opened properly and she looked down towards this goddess that had forced so much pleasure on her. Her hands gripped the sheets of the bed, holding on as Hermione thrust her cock deep and hard into Luna, taking ownership of her body. She grunted again and again, so close to orgasm, but desperately trying not to…

"Luna Lovegood, you are a filthy, dirty, slut of a whore, good for nothing but men to empty cum into and for women to hurt and take whatever little pleasure they can get from you. This is what I think of you!" Hermione thundered, her powerful, domineering voice and words cutting deep and making Luna moan with pleasure and humiliation. Thoughts of having a group of men surround her, hands rapidly bringing them to orgasm, long sticky threads of cum shooting towards her face...

Rearing her head back, Hermione took careful aim, then flicking her head forwards she spat as much of her spit as she could directly at Luna's face. The look on Luna's face was priceless for Hermione, a mixture of shock and self-disgust very quickly followed by a large glob of spit sliding into her mouth, followed by her head falling backwards as she screamed an orgasm back.

Hermione renewed thrusting her pelvis, gripping Luna's ankles in both hands and punishing that blonde, mostly-shaven pussy with the thick cock between her legs. She fucked Luna with a frenzy, an endless orgasm wracking her tormented body, Luna's scream now a soundless gasp for air. The sensation in Hermione's pussy of her magical strap-on cock was divine, she felt so powerful penetrating this woman, turning her once more into a mewling mess on the bed.

A good 30 seconds after Luna finished her multiple minutes of cumming, Hermione finally relented pleasuring herself with her endlessly pistoning cock. The young witch was now just making quiet purring noises on the bed and stroking her face like a cat. Looking down at her, Hermione adjusted the straps around her waist, beginning to remove her magical penis. "You were warned, toilet. I told you that you weren't allowed to cum without permission. Dirty, badly behaved sluts like you need to be punished so that they learn to obey."

Hermione picked up her wand from the bed where she had dropped it earlier. She waited for Luna to look up at her, seeing the wand in her hand pointing directly at Luna's face. The blonde witch blanched slightly before Hermione tipped the end of the wand down until it touched Luna between her exposed, perky breasts. Luna emitted a slight squeal, as Hermione kept moving the wand until it was now pointing directly at Luna's pussy.

"Restricto Orgasmus!" Hermione cried, as she flicked the end of her wand and striking Luna's soaking wet pussy. A very slight glow appeared over her pussy, which faded as Hermione spoke. "That should help you learn to obey slut. You are now no longer able to orgasm without my explicit permission. Ever. I think we will start with two weeks as a punishment and see how you cope. To make it more fun, every time you would have orgasmed, I'll get the pleasure instead, which will hopefully make you learn that I always come before you. Literally!" Hermione giggled at her joke.