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-Revenge Is Sweet-

A Harry Potter story

Written by SSK

Edited by Slicerness

Tags: Futanari, Transformation, Futa on Female, Male on Female, Penis/Breast/Balls Expansion, Domination, Body Modification/Alteration, Humiliation, Harem, Enslavement

Chapter 1

Enough is Enough

Hermione sat in the library working on her Transfiguration homework, this one was a difficult one on the difficulties of transforming a living creature into an inanimate creature and back. She was nearly done with writing the formula needed to make the spell work when the paper flooded with a wave of black. Hermione sat there blinking in both confusion and dawning horror before she heard the laughter behind her. She turned to see Millicent Bulstrode standing there laughing, her wand shaking in her grip as she hugged her shoulder laughing raucously. Hermione quickly processed what happened and she had a handle on the things an irrefutable and merciless rage formed within her. She had enough! Millicent had been bullying and making fun of her for years, and now the fat bitch had decided to up her game to actual sabotage.

Enough was enough, she was going to make Millicent wish she was never even conceived! Hermione stood, ready to pull her wand out when she stopped; an idea forming in her mind. An idea that brought a cold, cruel smirk to her lips she lowered her wand and walked past Millicent and out of the library, her mind working on the plan.

Millicent, after guffawing like a donkey, noticed Hermione was gone but had left her books there. She would've seized the chance to capitalize when Filch came in grabbing her by her hand. "You're in trouble missy!" He wheezed. Millicent struggled with the aged caretaker, but eventually surrendered and followed him to whatever punishment he was going to give her.

-Hallway to Slytherin Common Room-

Millicent groaned as she headed to the Slytherin Common Room. She had to assist Professor Snape in organize his potion ingredients. Meaning she had to carry the barrels and boxes with her bare hands while Snap shouted at her where to put it. She looked at her fingers, 'Damn my beautiful hands are ruined!' She moaned.

"Stupefy!" Millicent's world and mind went black.

-???-

Millicent groaned then she opened her eyes to darkness. Then she heard the light tapping of bare feet on cold stone. She slowly realized that she was naked on the floor and tried to move, but her limbs didn't even respond.

"You won't be able to move... Full Body Bind, you see." Said a sweetly venomous voice.

Millicent knew that voice, she might not be able to move her body but she could still move her eyes. She looked to see a darkened figure, "I think a little light is needed, Lumos!"

A wand lit up, a wand Millicent recognized as her own. Standing there with Millicent's wand in one hand and her own wand in the other was Hermione Granger, wearing a large cloak that covered her body save her feet.

Hermione put down Millicent's wand and reached into her cloak. "Hmmm, what to start with... let's see... this!" Hermione had retrieved a glowing pink vial from one of the deep pockets of her cloak. "This will make you less ugly." Hermione said she walked forward and she waved her wand. Millicent felt her mouth muscles start moving.

"Damn Mudblood, release me or I swear when I get out on my own I'll-guhgh!"

Hermione jammed the vial into her open mouth. The vial was small enough that all of it emptied quickly. Millicent tried to force her gag reflex to spit it out, but it was already working into her body. She felt hot, even with her bare back on the floor. She grunted as her body suddenly began to bubble and her skin and fat quivered, before it felt like her skin was tightening up. Her fat burned uncomfortably, her chest felt heavy, and her limbs and face ached. She felt her legs stretch and her butt suddenly began to spread on the cold floor. Eventually she finally felt these sensations recede, and Hermione stood up, looking her up and down.

"Oh my, you're looking gorgeous! Here, Accio mirror!" A mirror zoomed into her waiting hand, which she helped placed in the air and floated towards Millicent. The previously obese girl could now see herself in the full body mirror.

The sight of her own body caused Millicent to gasp. She was... well,beautiful, and voluptuous. Her face was thin and proportioned wonderfully, not too much cheek fat yet not too little that she looked like a skull, her eyes no longer squinty and piggy but nicely shaped and expressive. Her neck was also thin, much better than her lack of neck from before. Her chest was... not changed very much at all, at least size-wise. Millicent had always had a very generous chest, but it was mostly due to her overweight body. Now though her proud E-cups were firm and bafflingly perky, barely sagging at all, even where gravity should have weighed them down. Her arms and legs were long and thin with smooth flawless skin. Her previous muscle was still there, but played in perfectly with her looks, retaining her strength while looking all the better for it.

"Hmm let's flip you over." Hermione said, making a clockwise spin with the tip of her wand.

Millicent felt her body raise off the ground before she quickly spun 180 degrees so Hermione could see her backside. Like her chest, her ass had remained the size it used to be, but was now firm and smooth looking. The end result was an astronomical sized backside on a thinner body. If one were to measure it the result would be at least 34 inches around, if not even bigger. It jiggled as she was jerked back and forth in the air by Hermione.

"Oh this is gonna be very juicy! Yes it is!" Millicent fell and the mirror flew into the air as Hermione stepped forward and opened her robe. Millicent saw her and she only had one urge: scream. And scream she did.

"G-Granger you Mudblood... FREAK!" She shrieked.

Hermione stood there, her nude body chilled by the air, but it wasn't a thin weak body. Hermione's body was now slightly more filling, lean muscles now present, however that wasn't what made Millicent scream. Between her legs however was a large cock and balls, the cock itself was huge, at least a foot long and her balls were the size of softballs. "You, you damn shemale!"

Hermione felt a tick of annoyance and she walked up to Millicent and slapped her so hard that she felt herself fall to the ground unable to move the slap left a definite imprint on her face.

"First of all, the name is Hermione, second of all I'm not a shemale, I'm a hermaphrodite they are both extremely different, though one with your lackluster intelligence wouldn't be able to tell the difference. Finally, as my whore you have no say in the matter." Hermione said.

"Y-Your what!? I would rather die than be your whore!"

Hermione smirked. "I can arrange for that, but I have something else in mind." She reached into her cloak and pulled out a vial with a purple liquid. "This is the potion that gave me my wonderful attachment, if you take a small amount of this you can have this dick and balls temporarily. Take more than that however and you're stuck with it for life!" The bookworm exclaimed. "I wonder how that will go? Millicent Bullstrode, the thin beautiful cock waving freak!" Hermione smirked so widely her eyes were slits. "You have two choices; walk out of here a freak... or become my willing slave. Choose well because in five seconds I'll choose for you! Five..."

Millicent wanted to move and kick this freak in the nuts!

"Four..." She had to move, she had to! No damn Mudblood was going to push her around!

"Three... Two... well I guess you want to be a freak." Hermione said with an air of smug satisfaction.

Millicent imagined walking through the school with that ridiculous thing attached to her body forever. "W-Wait!" She shouted.

Hermione stopped counting and she cocked her head.

"I'll... be your slave..." Millicent mumbled quietly.

"Hmm what's that, I couldn't hear that quite clearly?" Hermione said in a mocking tone, putting a hand to her ear and leaning in closer.

"I'll be your slave!" Millicent shouted.

"'Your slave... what?" Hermione said a smirk of superiority on her face.

"M... Mistress?" Millicent said sadly.

"Goody, now then let's get to business!" Hermione grabbed her wand and stood up. She then walked over to Millicent's lower region and placed her wand above her crotch.

"Wh-What are you- AGHHHHHHH!" Millicent screeched with pain as Hermione's wand lit up and the smell of burnt flesh filled the air. Millicent began to sob as Hermione continued to do whatever it was she was doing. Pain like she had never felt flooding her. Then it was over.

"Hmmm the Dark Mark... though I think mine should be called the Slave Lock." Hermione commented proudly. She then waved her wand and Millicent felt the strength of her limbs again.

She sat up and looked down; just above her pussy was a mark. It was shaped like a heart with a single chain wrapped around it with a keyhole. Hermione grunted as she began to make the 'Master Mark' on her own body. When she finished she looked at it pensively, it was a simple key. "Hmm fitting, now you're mine, which means if I say bark, you bark, if I tell you to bend over, you bend over, and if I tell you to smile you better fucking smile!" Hermione hissed walking forward and grabbing Millicent's hair and yanking her up, the girl whimpering in pain. "You understand?" Hermione asked.

"Y-yes Mistress!" Millicent whimpered, prompting Hermione to release her. Millicent, no longer cushioned by her fat, hit the ground painfully. She then felt something poking her butt. "G-Granger!?" A slap on her rear just as hard as the one to her face caused her to yelp, "Mistress!" Millicent corrected hurriedly.

Millicent wasn't sure what was going on, but she was afraid of the Mudblood! She felt the anger and hatred building up, only for it to leave her suddenly, along with the air in her lungs when something slammed into her pussy. She gave a breathless gasp as something tore. It was painful, very painful; she wanted to scream, but something held her back.

"Well it's only natural you're a virgin, anybody that would even think of boning you before would be to turned off by your filthy smell and horrible attitude. Now though, maybe..."

Suddenly Millicent felt a hand around her neck. "But remember, you're mine now, which means that you don't date anyone unless I say, you don't fuck anyone unless I say and you don't disobey me. Ever." Millicent felt Hermione's lips at her ear and she shuddered, somehow aroused by it. "Understood?" Hermione demanded as she failed to get a reply.

Millicent nodded and Hermione pulled back and began to move. Millicent bit her lip to suppress the pain and stop the moans she knew would come. Hermione couldn't believe how good it felt, fresh virgin pussy was so tight and hot. Her dick was sending millions of signals into her brain.

She almost considered drinking more of sweet elixir and making her addition permanent, but she had other plans. She was thrusting hard now, letting her desires run wild and control her hips. She heard Millicent's whimpers of pain, but it only egged her on as she hammered her hips into Millicent's fat ass, slapping the plump cheeks, making Millicent give little mewls of pain.

Millicent was devastated, the Mudblood Hermione Granger had invaded her. 'Damn her, I'll get my revenge when this is done!' She thought angrily before it was washed away by pain. Millicent moaned as she felt the hard slaps, but slowly the motions were replacing the pain with pleasure. Eventually her mewls of pain became mewls of pleasure. Just a few seconds later she winced as sharp fingernails dug into her butt. "Who said you could enjoy this!?" Hermione roared.

"I-I'm sorry Mistress!" Hermione reached for her wand, grabbing it and aiming it squarely at her cock. "Engorgio Duplio!"

Millicent screamed as the cock suddenly swelled to twice its size, starting to bulge against her smooth stomach. She scrapped at the ground with her nails, breaking three of them, sobbing in pain.

Hermione's mind was awash with ecstasy as every inch brought even more pleasure.

"P-Please I'm sorry Mistress! For-Forgive me!" The Slytherin bully begged piteously.

Hermione knelt there thinking on that. "Reducio."

Millicent gave little squeaks of relief as Hermione's cock shrunk down, still bulging against her skin but less so than before.

"Th-Thank you mistress..." Millicent sighed with relief, but Hermione pointed her wand at her balls this time.

"Engorgio Triptole!" Hermione grunted as she felt her balls begin to swell rapidly, actually reaching the floor. Hermione grabbed Millicent, squeezing her tight. "Fuck, my balls!" She growled and felt her body lift off slightly as her balls swelled to the size of a yoga ball each. "God they feel so big and full!" Hermione growled, Millicent gulped as she looked and saw the massive balls.

'She can't be thinking what I think she's thinking!'

Hermione grinned. 'I wonder what the first human cum balloon looks like!' She wondered before she resumed thrusting, her cock bulging against Millicent's abs. 'God it feels even better with a bigger dick. No wonder boys are so horny and can't stop thinking about fucking!'

Hermione suddenly leaned forward and grabbed Millicent, pulling her up so the two were standing before Hermione spread her legs so her balls had room. Once the two were standing and stable Hermione thrust her cock up into Millicent who moaned and squeaked. Hermione didn't just stop at one and was thrusting harder and faster now, like a jack hammer. She could feel something building up inside her, something so huge it was causing her body to seize up. _'This feels like... an orgasm!'_Hermione smirked, "I hope today is a safe day for you my slut, because here comes a big one!"

"M-Mistress please don't-!" Millicent wanted to do something to stop this, and her final struggle was to foolishly jerk her hips backwards, trying to force Hermione to fall and release her.

Hermione's vision exploded with stars as one of her savage thrusts was met halfway by Millicent's fat ass. "You're mine!" She screeched, almost to the point of drooling on herself as she gave one final thrust, letting out a primal roar of triumph as her cock bulged and began spraying the first shot of cum.

Millicent gave a strangled cry somewhere between an orgasmic moan and a scream of terror. One thought kept replaying in her mind. 'She came in me... she came in me... she came in me!!!' With that thought any thought of resistance shut down. She was being filled by a filthy Mudblood mutant with a dick, and balls that were pumping her full of so much semen her womb was inflating like a water balloon. Any chance she had at marrying a proper Pureblood was gone, she was soiled now. She then felt the dick slide out of her, but felt it thrust between her thighs, still shooting cum, creating a small puddle of the stuff beneath her. Hermione sighed as she came for a full minute before her orgasm finally subsided and she sat down, pulling Millicent with her.

She pointed her wand at her balls. "Reducio Triptole."

She sighed again and gave a shudder as her balls shrank back down to their softball size.

"Reducio." She cast again, this time aimed at her cock. It shrunk as well, and when it was done she moved away from Millicent.

She was going to grab her cloak when she heard the sob from Millicent. "So now you know how you're bullying feels huh? Well just so you know I'm not even done repaying you for all the abuse you dealt me!" She angrily grabbed her cloak and turned to Millicent to see her sobbing, curled into a ball.

Hermione stood there for a moment, just watching, before she walked forward. She knelt down and stroked Millicent's hair, causing her sobbing to eventually turn into low hiccups and whimpers. She looked at Hermione, who bent forward and kissed her forehead. "Well if it's any consolation I think you look beautiful. Besides, I'm rather glad I fucked you. It felt... well, good! Better than anything I'd ever felt in my entire life. Next time I'll make you feel good too, does that sound good?" Hermione asked huskily.

Millicent looked at her then nodded slowly. "I... I'd like that Mistress..." Hermione smiled and kissed her cheek.

"Good, now let's get you cleaned up. You're on your own for getting back. I have to return to the Gryffindor Common Room." With that Hermione emptied Millicent's womb of her cum with a Vanishing Charm and the two dressed and heading to their room.

-Slytherin Common Room-

Millicent got to her bed quietly and laid down, hiding herself under her blankets. She put a hand on her belly where it had been inflated with cum. A thought came to her, one that made her pussy throb. Her belly, huge and bulbous, but instead of cum it was filled with life. 'Mistress wouldn't do that to me, it would be disgusting, breeding with the enemy.'

However, in the back of her mind, a small joy came to her, the joy of becoming pregnant with her Master's sperm. Millicent closed her eyes, dreaming a life she could now never have.