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Secret Clubhouse: The Polyjuice Professor (Hogwarts Mystery)

“Now remember, no peeking” Tulip repeated, again, as she pulled the blindfold tight around Tonks’s head.

The hufflepuff sighed, holding still as she pulled the silk blindfold tight. She tried to adjust it but the ravenclaw girl smacked her hand. “I promise, I won’t peek” she said, unable to see a thing.

She sat half naked on the bed in the clubhouse, her pink bra and grey panties the only thing she was wearing. Which was more than what Tulip had as she knelt behind her topless with just her blue underwear. They’d been in the process of fooling around and getting into some sexual acts when the redhead interrupted their fun to play a new game with her. Fortunately Tonks was very much into anything kinky in the bedroom so she wasn’t put out. She sat on the bed with her hands obediently on her lap, waiting excitedly for whatever her partner had planned.

Tulip climbed off the bed once she was sure Tonks couldn’t see anything. She had a big smile on her face as she walked around to stand in front of her. “Now don’t move. I’ll be right back” she said, tiptoeing over to the bedside drawer to pull out something she had stashed earlier. She picked up the potion bottle and fiddled with the stopper, biting her bottom lip nervously. She looked back at the young witch waiting for her and took a deep breath. But first she removed her panties and stepped into the middle of the room. Once she drunk this potion, she’d need the space to prepare. She pulled out the stopper and took a whiff of the drink. It had a minty, complex scent. I’m not sure what I was expecting she thought as she brought it to her lips and gulped down the Polyjuice potion.

Tonks could faintly hear Tulip moving around the bedroom, attempting to follow her with her hearing while she peered into the blackness. She rapped her nails against her knee and tapped her foot impatiently. “You’d better not have left me alone in here again” she warned. She waited for a moment until everything fell silent for a minute. “Tulip?” She called more anxiously.

“Hold on, just getting ready” she replied after a pause.

Tonks exhaled and groaned with impatience. “Hurry up! We don’t have all day. And I’m horny” she whined.

There was another pause until Tulip finally replied “okay, all set.” Tonks sighed and reached for her blindfold. “No peeking!” Tulip snapped.

She huffed, waiting on the bed until the prankster told her to come to find her. “This had better be good” she said, climbing off the bed and carefully stumbling forwards with her arms out. Whatever game Tulip was playing was starting to wear thin. “Where are you?”

“Getting warmer” she sang. The pink haired girl rolled her eyes behind the blindfold, following her voice across the room until she closed in on her position. She held her hands out and felt her way through the air until she made contact with naked flesh. “So very hot” Tulip cheered.

Tonks stepped forward, smirking as her hands found the naked body of her partner. But then her smile dropped when she realized something was wrong. This wasn’t Tulip, she was sure of it. Her body was the wrong shape, her skin felt different. Her hips were too wide, her arms were too short, her boobs were much bigger. And she was shorter, her hands finding a mop of hair too curly and matted to belong to the redhead. She backed away nervously. “Who are you?”

“It’s me” Tulip said, catching Tonk’s hands and kissing them. Tonks hesitated before stepping forward again, feeling her face when she pressed her palm against her cheek. “It’s still me. I just took some Polyjuice potion” she explained.

Tonks ran her fingers over Tulip’s new face, and over her neck and shoulders. She certainty felt like a different person. But there was also something familiar about it. “So who are you?” She asked.

“Don’t you want to guess?” Tulip laughed. She took Tonks by the cheeks and planted a lustful kiss on her lips. Tonks reluctantly made out with her while she explored this new body, which was much rounder and larger than Tulip’s tall slim frame. She explored her lips with her mouth and tried to form an image in her mind of who she might’ve become. She was definitely a girl, but not one of her friends. Someone older, larger, and shorter. She tried to think of how many students could fit that criteria, but behind every name she considered another kept popping up. But that name didn’t belong to a student, so it couldn’t be…

Her face paled and she gasped. “You didn’t!” She squeaked.

She felt Tulip’s lips smirk against hers. “I owed you a dare” she whispered.

Tonks leapt back and whipped off her blindfold, staring at her lover who was now wearing the body of their Herbology professor, Sprout. Her eyes bugged out of her head as she looked at the older woman’s naked body, exactly like she’d always imagined it. She had experimented with transforming into Sprout a few times, but she realized she’d gotten some of the proportions off in her efforts. Her breasts were larger and hung lower, and her hips were more curvy in reality.

She stepped back in shock as Tulip audaciously gave her a twirl to admire. “How do I look?” She asked, and it was disorientating hearing Tulip’s voice coming from Sprout’s mouth.

“How…how did you manage that?” Tonks asked, completely shell shocked. Tulip knew she’d always fantasized about having sex with the professor, and had promised she’d find a way to use Polyjuice to change into her for one of their games. But she never thought she’d manage it.

Tulip smirked. “It was easier than you might think. Penny helped me brew the potion, of course she thinks it’s for a prank. Jae acquired Sprouts hair for me. I didn’t ask how he got it, but I did make sure to verify it first. Didn’t want to change into Mrs Norris or something.”

Tonks stared at Tulip’s body in awe. It was incredible, and arousing. Her nipples hardened and she felt her pussy get moist staring at her. “You did this for me?” She whispered.

Tulip smiled, brushing the girls cheek. “I wanted to do something special for you, partner. Now you can tick off something from your bucket list. You’ve got me for the next hour to play with however you want.” She stood in front of her as she stared silently, her shocked expression becoming frozen like she’d stopped functioning. “Well? Aren’t you going to say something?” She asked anxiously.

Tonk grabbed Tulip by the head and smashed her lips against hers. The hufflepuff snagged her Head of House greedily, taking Tulip by surprise at how ferocious her kiss was. “I love it” she whispered with a big smile, ripping her underwear off and pulling the older woman onto the bed with her. “Thank you” she said.

Tulip grinned, kissing the girl back. “Now show me a good time Miss Tonks, before I deduct house points” she ordered.

“Yes professor” Tonks replied, climbing on top of her eagerly.

Tulip had very little experience using Polyjuice herself, so she found it strange being in a body that wasn’t her own. Which added to the excitement as she laid down in Sprouts mature body watching the teenage student ravish her eagerly. She made out with the hufflepuff passionately, her lips feeling very different on her mouth. It was like everything she had was alien to her, but she felt the sensations exactly the same way. She came to the conclusion she liked being a larger woman, it gave Tonks a lot more flesh to play with and explore. And her breasts were so large they were like pillows, and she moaned whenever they were squeezed.

Tonks lost herself in enjoying the professor’s naked body too, kissing down to her chest to suck on her tits diligently. She motor-boated her cleavage and squeezed them with her palms, dripping with arousal as she rubbed herself against her. She caught her eye as she played with them and had to keep reminding herself it was Tulip wearing her body and not her Head of House. "So big" she purred, crawling down between her legs and opening her thighs to gaze at her moist womanhood. She dove in and kissed her pussy before devouring it with her tongue. She had wanted to do this for ages.

"Oh, fuck me” Tulip gasped, watching Tonks go down on her hungrily. She bit her bottom lip and played with her own breasts while she had the horny witch eat her out. “Fuck, right there” she moaned, rocking her hips against her mouth until she orgasmed. Tonks sucked up her juices thoroughly, so thoroughly Tulip gripped her head and rode her tongue to another climax. She gasped and panted, heaving for breath as she pried the pink haired girl out from between her legs. “Fuck” she gasped. “If you showed as much attention in your OWLs as you did in your ORALs, you wouldn’t be so behind Nymphodora.”

Tonks giggled, apologizing to her professor promising “I’ll do better next time.” She crawled up and made out with her, exploring her body with her hand before reaching down to finger her pussy some more. Tulip moaned as she rubbed her clit, slipping two fingers inside of her and driving her insane. “Too bad I’d never get away with this on the real Professor” Tonks whispered.

Tulip nodded. “It would go down in the history books. Hufflepuff seduces teacher for better grades” she laughed.

Tonks fingered her into another big orgasm, watching her convulse before her eyes. Her pussy felt nothing like Tulip’s, but she tasted the same. It seemed Polyjuice doesn’t change everything. “How does it feel being someone else?” She asked.

“Strange” Tulip breathed. She looked up at Tonks and grinned with Sprouts face. “And exhilarating. Now I think it’s time for the teacher to give you a demonstration” she said, rolling them over so Tonks was on her back and she was crawling between her young legs. “I hope you’re paying attention Miss Tonks. You will be tested later.”

“Yes professor” she giggled, spreading her legs wide and watching Sprout lower her face between them intently. She gasped as she licked her slowly, her mouth and tongue so different to Tulip’s. She moaned as she sucked her clit, redness rising in her cheeks as she got so turned on. “Fuck me miss. Please fuck me.”

Tulip watched Tonks come undone under the sight of her professor fucking her. Damn, she does have the hots for hershe thought, a mischievous smile spreading as she lavished her pussy. She was so glad she agreed to do this with her. She deserved some fun. She hoisted her trembling legs over her shoulders and devoured her cunt, munching her delicious pussy until she was shaking with orgasms. Tonks gripped her curly hair as she came, staring at her in wonder until her climax ended. “Class dismissed” Tulip muttered, licking her lips as she crawled up her body. “I hope you’ve learnt your lesson, Miss Tonks.”

Tonks smirked, staring at her lover lustfully. “I think I deserve another detention Miss Sprout” she replied, biting her bottom lip. “I’ve been having naughty thoughts about a teacher.”

“Oh? Now, we can’t have such inappropriate behavior in class, can we?” Tulip grinned, getting into the role-play as she took the naughty prankster in hand and bent her over her lap. Tonks shook her delicious ass tauntingly, even expanding her cheeks in anticipation as Tulip began spanking her. She giggled at the absurdity, smacking Tonks over and over until her bum was red. “Have you learnt your lesson? Or do I need to bring out the more…severe methods” she asked, rubbing a finger over her puckered hole.

Tonks looked over her shoulder biting her bottom lip. She suddenly smiled and shifted her form into Tulip. “I deserve to be punished professor” she cooed in Tulip’s voice.

Tulip glared at herself, remarking “you think I’ll give special treatment because you look like me? Impersonating another student is a grave thing, Miss Tonks” she warned, licking her finger before spearing her tight anus. Tonks cried out wearing Tulip’s face, grinning as she was anal fucked with her finger. Tulip fucked herself from behind, plunging two more fingers inside stretching her ass wider until Tonks was forced to revert back from the force of her orgasm. She panted heavily, catching her breath while Tulip hoisted her onto her lap. “Now do you promise to be a good girl from now on?” Tulip asked, playing the part and putting on her best Sprout impression.

Tonks nodded, muttering “yes miss” before breaking into a grin. “This is so hot” she said, kissing Tulip on the lips.

“It is, isn’t it” Tulip grinned, making out with her. “Fuck, I never thought roleplaying as a teacher would be so arousing.”

“If you’d like, I could play the teacher and you be the disobedient student next time” Tonks offered. She shot a mischievous smirk. “Or I could become Dumbledore now and he could discipline his staff” she suggested.

Tulip gave it a single moment of thought before shaking her head. “Let’s not over complicate the weirdness. We’ve got another half hour with this potion, and I’d rather use it to fuck you, not a guy.”

“Fine” Tonks shrugged, happy with that arrangement. They kissed some more before Tonks bit her lip nervously. “There is something I’d like to try though” she said.

Tulip lifted an eyebrow. “Is it kinky?”

“Very.”

“Well then, what do you have in mind?”

Tonks knelt on the mattress in front of her and closed her eyes. Tulip watched her rub herself for a moment before her body changed shape again. Her eyes bugged out as a long hard cock expanded from her clit and replaced her pussy. Tonks took hold of it and blushed as she watched her friend admire it. “I’d been practicing ever since I first had sex as a guy” she explained. “I hope it’s not too weird for you?”

Tulip stared at the erection hanging between the hufflepuff’s legs, lifting her gaze up her sexy body to smirk. “I think this is the sexiest thing you’ve ever done” she said, itching to touch it.

Tonks grinned, suggesting she prop herself on the pillows so she could straddle her. Tulip obliged, getting herself comfortable while Tonks rubbed herself above her. She lifted an eyebrow when she didn’t move herself between her legs and instead crawled over her large stomach inside. “I’ve always fantasied about these breasts” Tonks confessed, reaching down to play with Sprout’s large jugs.

Tulip moaned as she squeezed and jostled them, her eyes still fixed on her dick. She reached down to wrap her hand around it and Tonks gasped, biting her bottom lip in arousal. “How does it feel, having a cock in your own body?” She asked curiously.

“Like having a cock in someone else’s form” she replied. “It took some getting used to. It was like I was shifting the elements of my pussy around to make a penis. The tip was as sensitive as my clit, holding the shaft feels like when I rub inside my pussy, it’s weird when I pee standing up..” she trailed off as Tulip began stroking her, panting heavily as it throbbed into her hand. “It gives fresh appreciation to all the boys who have to carry one all the time” she added.

“Can you make it bigger?”

“Yes, but I think this is big enough” she said, gently coaxing Tulip’s hand away so she can slot it between her large mounds.

Tulip got the idea and helped wrap her tits around her penis, squeezing it between them as she moved her hips back and forth. She giggled in amazement. “I’ve never been able to give someone a titjob before.” She got a playful idea and waited until it poked through her mounds before leaning down and giving the tip a lick with her tongue.

“Fuck! Do that again” Tonks gasped. Tulip did, many times, kissing her cock with each thrust between her boobs. After a short while she got really playful and opened her mouth to take the tip between her lips and suckle it. Tonks moaned as she got a blowjob and a titjob at the same time. But after a while it was hard to concentrate on the tits and released them so she could grab her head and shoulder for support. “Fuck, that feels so good” she moaned.

Tulip took the initiative and brought her hands up the back of the girl’s thighs, grasping her gloriously firm backside to guide her deeper into her throat also she could suck her off. Now it was in her mouth she was thankful for the size Tonks chose. It was big enough to fill her throat but not so big it choked her. And Sprout’s mouth appeared to be built for blowjobs. She watched Tonk’s face contort in pleasure she she blew her, lavishing her tongue around the tip while she massaged the length with her hand, exploring this sexy girl cock thoroughly.

She was just lamenting the lack of balls underneath when Tonks gasped from the gentlest of caresses across the strip of flesh between her anus and her penis where her pussy should be. “Holy shit!” She sneezed.

"Are you alright?" Tulip asked.

She nodded, catching her breath. “I’m fine. It’s just…that spot…”

She looked at her body inquisitively. “What? This spot?” She asked, brushing her fingers across the undercarriage again. She whimpered and frantically nodded. Tulip lifted her cock and examined the smooth tender flesh, caressing it gently and watching Tonks lose it. “Is that…is that where your G-Spot is now?”

“Yes” she whispered, her knees starting to shake as Tulip kept toying with it. “Oh fuck” she whimpered.

Tulip grinned mischievously. She leaned down and ran her tongue along the strip of flesh, watching her tremble in uncontrollable pleasure. She brought her tongue up the underside of her dick and them wrapped her lips around it, sucking her hard while she played with her new special spot with her fingers.

Tonks gripped her hair tightly as she played with her, whimpering and panting, struggling to compose herself. “Oh god, I can’t…please stop…you’re going to make me…fuck…fuck, I’m cumming…oh god, I’m going to cum!” She cried.

Tulip released her dick and brought her breasts up and around her again. “That’s right Nymphodora dear” she sang in her best Sprout voice. “Water these delicious melon. Make them nice and…”

Her dirty talk was interrupted when Tonks erupted with a geyser of cum bursting out of her cock, drowning Tulip’s face and chest with thick white substance that could’ve been mistaken for semen. Tonks clutched her dick as she sprayed her teacher’s face like it was a fire hose, painting her with more cum as she jerked and spurted and gasped uncontrollably. Tulip cheered and then gulped as she was met with more than she was expecting. She coughed and grunted as it got in her eyes and hair and dripped onto the pillows beneath her.

After a long while Tonks finally stopped squirting and slumped against the headboard heaving for breath. Her cock dripped and turned flaccid and she clenched phantom balls which had just been emptied. She looked down at the mess she made of her professor and turned bright red. “Sorry. I should’ve said…I always cum like that when I touch myself down there.”

Tulip wiped the cum from her eyes and blinked. She licked her lips and found it tasted like Tonk’s normal cum, but thinker. She looked up at the blushing girl, then at the cock already ignoring a boys refractory period. She reached out to touch it again but Tonks inhaled when her fingertips ghosted underneath her spot again. She begged her not to and Tulip pulled away. “Are you okay?” She asked her.

She nodded. “I’ll be fine. I just need to catch my breath” she heaved.

“Good. When you have, I expect you to clean up this mess you’ve made of my classroom, Miss Tonks.”

Tonks stared at Tulip in shock before bursting into a grin. She leapt down and eagerly began cleaning her up with her fingers and tongue. Tulip helped her by sucking the cum from her breasts while she gave her face a tongue bath. After a few minutes they’d both managed to lick up most of the cum until they felt sick, so Tulip smeared the rest across her breasts making the skin glisten.

They kissed each other passionately, not at all put off by Tonk’s abrupt ejaculation. “Got enough in the tank for another round?” Tulip asked.

Tonks glanced down at her dick as it grew hard, Tulip’s legs already opening up in invitation. She grinned excitedly. “Wotcher! I’m ready” she said, climbing into position at her entrance. She hovered over Tulip’s entrance, savoring the anticipation before slipping inside her mature pussy. “Holy shit!” She gasped, the texture and feel completely different to Tulip’s body.

Tulip moaned as she was penetrated, Sprouts womanhood enveloping her cock like velvet. She wrapped her legs around her and pulled her in deeper until she was sheathed between her spongy thighs. The Hufflepuff student nestled against her, her palms fondling her large breasts as she closed her eyes. “Everything you ever hoped for, my dear?” Tulip asked playfully.

“More that I could’ve imagined” she whispered, staring at Professor Sprout’s body in awe. She moved her hips gently, enjoying the feel of her walls around her dick. Tulip hooked her feet over her bum and assisted her in thrusting in and out, both women moaning in pleasure. “It all feels so soft” she muttered, peppering kisses over her bust and shoulders.

“I expect top marks if you want to pass you exam” Tulip said in her Sprout voice. Tonks giggled, nodding enthusiastically as she increased her pace and fucks she’d faster. Tulip moaned and panted, losing herself to this cock and Tonk’s body, reveling in the sensations Sprouts body gave her as the student played with the larger woman. The two of them gave in to their pleasure until they reached the peak of their arousal, their hips hammering away until they both climaxed together. “Yes, you’re going to make me cum” Tulip gasped, wrapping her arms around her friend as she grunted, pumping her pussy full of her cum. The sensation of being filled made her explode and she screamed “FIFTY POINTS TO HUFFLEPUFF!”

The pair of them colapsed from exhaustion after the orgasms passed. Tonks slumped on top of her professor, snuggling against her big beautiful body purring softly. Her penis slipped out of her overflowing cunt and melted back into her body as she reverted to normal, her own pussy dripping onto the bedsheets. Tulip panted and cradled the younger woman in her older arms. She estimated she had a few more minutes left on her potion. “Do you want to fool around until this wears off?” She asked her.

Tonks rubbed her cheek against her neck and smiled. “No, I’m tired. Can we just cuddle until you change back?”

“You are a hopeless romantic, aren’t you” she teased.

Tonks giggled, pecking her lips with a kiss. “Thank you” she whispered affectionately.

“Now you have something to daydream about in herbology” she joked, kissing the girls forehead as she rested against her pillowy bosom.

Just as the girls were about to doze off, they heard footsteps coming up the stairs of the clubhouse. They both looked up in surprise when they heard a gasp moments later. They shot up in bed and turned pale when they saw Penny and Jae had discovered them. Penny looked completely shocked and red faced, covering her mouth mortified, while Jae had his arms crossed and was smirking. “And here I thought a teacher sleeping with a student was frowned upon” he joked.

Tonks looked down at Tulip, who was still in Proffessor Sprout’s body, and stammered “it’s not what it looks like!”

Jae examined their naked bodies and guessed “it’s exactly what it looks like.” Penny averted her guess in embarrassment, not wanting to see her head of house naked.

Tulip’s cheeks turned red as she quickly explained “I’m not Sprout. I’m…”

“We know, Tulip” Jae laughed, nodding to Penny. “We bumped into each other and Penny mentioned how you wanted a Polyjuice potion for a prank. Suddenly the hair I got you makes sense. Though this is a funny sort of prank” he remarked.

“We just came up here to study” Penny explained hurriedly, awkwardly covering her eyes trying not to look. “We didn’t mean to interrupt. We’ll just…I’ll go study in my room” she decided, dashing down the steps.

Jae chuckled and decided to leave them to it also. “And don’t worry, we can discuss a fee on me keeping this between us later. You’ll find my rates are quite reasonable” he said with a devious smirk.

The girls waited until he disappeared down the steps before falling back onto the bed mortified. Tonks buried her face into Tulip’s boobs to hide her humiliation. “That’s it. I should just transfer to a new school now. You think Drumstag has a spot open?” She asked through her cleavage.

Tulip shook her head, covering her eyes in shame. “Penny won’t tell anyone. I’m more worried about Jae’s idea for extorting us for his silence.” No doubt he’ll ask for something outrageous, like sex she thought.

Despite being rumbled and the humiliation of it, neither girl was in a hurry to leave the bed until the potion had worn off and they got to cuddle with each other in their natural forms. Being Sprout for an hour was fun, but Tulip much preferred her own body to play with. And while Tonks still had a huge crush on the Professor, she enjoyed Tulip’s natural form even more.

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