Twisted Sister

Tomiko was horrified by what had happened to her cute little sister Kei. Her sister had become a monster and was getting worse by the day and there didn't seem to be anything she could do to stop her.  Publicly she was forced to pretend Kei was now her new friend Kelly, the hot white American exchange student, but in secret Kelly was controlling her and ruining her life.  Just how had this all happened?

It was true that Tomiko's shy and innocent little sis had always wanted to be like her brash and outgoing older sister, following Tomiko around everywhere and trying to copy her - but that didn't mean she needed to end up going bad.  Sure... Kei had been jealous of all the boys that were constantly hitting on Tomiko and the beautiful clothes and makeup her older sister got to wear, but her turn would have come naturally one day. Kei was just so plain and boring, academic and nerdy, but lacking in her sisters striking looks - if she'd been patient though, one day she would have got the same.

Instead Kei decided to rush things unnaturally.  She had heard about something called 'Elixir' - a western drug that could unleash your sexy side and make you older, hotter and sluttier.  She managed to get hold of the formula and created a batch in her high school lab.

Kei thought she was alone in the house when she took the Elixir. She groaned as the sweet tasting pink liquid slipped down her neck and a powerful sexual heat burned instantly through her body.  She panicked at first, thinking of what had she had just done - but it was too late as the transformation began to take over her and turn her into someone different... better... bitchier...

"Ohhhh yessssss," she groaned... tearing at her loosening clothing and arching her back as her bones and joints popped and shifted.  She could feel strength and power flowing through her weak little body and she exulted at the sensation of becoming more more powerful and mature, her body beginning to expand and grow as it rapidly aged.

Suddenly the door to her room burst opened and Tomiko... who had been quietly studying next door rushed in.  She had heard her sister moaning through the wall and had worried Kei was in pain or in some sort of trouble.  Instead what she saw - was her sister writhing in ecstasy whilst her buttons popped off her blouse and she changed and transformed before Tomiko's horrified eyes.  Kei giggled as she saw her sister and she ran her hands over her changing body, "Ooooh, it's too late to stop me now sister... ahhhhhhh I'm changing and I LOVE it!"

Kei's body was lengthening and getting bigger, but losing none of its curves.  Her tiny Japenese body was instead growing bigger in proportion, still feminine and delicious, but now tall and powerful. Her once scrawny muscles were toning up nicely, her stomach becoming flat as a washboard and well defined, she was becoming physically more dominating than her now tiny sister.  "Haha ohhh yes, look at how big I am... I'm even bigger than you now sister," hissed Kei in pleasure as she ripped off her boring old clothes and revealed her glorious naked body.

"Mmmmh, yes come to Momma, give me those big tits," groaned Kei in a lust fuelled giggle as she grabbed her boobs and her once almost completely flat chest began swelling out and rounding, a pair of gravity defying perfectly formed white plastic-looking tits pushing achingly out of her chest.  She must have been a DD cup now and her skin tone was lightening - she was tanned - but definitely white now rather than Japanese.

"Yesssss make me into a fucking Goddess," groaned Kei in what sounded more like an American accent than Japanese as her short black hair turned blonde and lengthened down her head.  The new bitch smiled wickedly and stretched out her perfect new body. "I feel so wicked and I LOVE it."

Kei stood up, her fingernails lengthening into slutty claws as she slid her hand down to her crotch and inside her tight shaven pussy.  Sighing in unholy joy the reborn whore began to finger herself as her tits reached their new massive size and she used her other hand to massage and rub the nipples till she was dripping wet and aching to be fucked.

"Yesssss it worked, I'm beautiful and sexy now. I feel so fucking good, I am so much better than you now sister. I'm a hot white slut, and you're a nothing... everyone will desire and lust for me now instead of you! Hahaha!  I need a new name for my new body... Kei is sooooo Japanese and pathetic.  From now on you can call me Kelly."

Kelly laughed as she grabbed Tomiko and wrapped her fingers around her sisters throat. Effortlessly she lifted her up and pinned her against the wall. "Listen here you little bitch, you're smaller and weaker than me now so you'll do everything I say.  Stay out of my way and you won't get hurt, otherwise I can't be held responsible for my actions.  You're going to tell everyone at school that I'm your sexy American pen-pal who is here on an exchange.  Publicly we'll be friends for now, but you better do as I say or else. Now then... I need some clothes..."

Dropping Tomiko to the floor with a laugh, Kelly pushed past her and went into her room.  Tomiko chased after her and watched in horror whilst her once loving sister began stealing her expensive clothes, makeup and jewellery.

"These are mine now... they look better on me anyway," smirked Kelly as she found a sexy red latex outfit that Tomiko had hidden at the back of her wardrobe and began to struggle into it.  The new slut loved the idea of tight clothing, especially latex... it made her feel like such a hot bitch.  "Yes, this suits me so well," she exulted examining her hot blonde body in the mirror.  "Fuck this is so much better than being your dumb little sister."

"Kei... stop this, this isn't you... you have to fight this!  You've become totally evil," begged Tomiko as Kelly applied makeup in the mirror.

"Hahah, Kei is gone Tomiko - she's grown up into me and it feels sooooooo good.   I'm gonna make sure that Kei realises how much better she has it being me."

Tomiko was sure her little sister was still inside this bitch somewhere. She would just have to be patient and hope that the Elixir would wear off, then she could save her.  For now she would have to go along with Kelly's plans.

They went out and Kelly forced Tomiko to go to the shops where she insisted on raiding Tomiko's bank-account to buy more latex clothes and sex toys for her new body.  Everyone they met was told the same lie - that Kelly was the hot exchange student and would be starting school tomorrow.  Tomiko had no idea how she was going to explain all this to her Mom and Dad... her mind was in a mad panic.

They returned home with only an hour before their parents were due back and Kelly went to her bedroom alone, demanding to be left alone. Moments later Tomiko heard a buzzing sound of a vibrator and soon horny moans and gasps of pleasure filled the air.  For the next hour Kelly fucked herself, no doubt working her way through the various sex toys she'd bought.  Tomiko's eyes watered at the thought of the ten inch rubber cock she'd seen her new sister buy... surely she wasn't using that?  Was she?

The sounds of pleasure had ceased in the bedroom and Tomiko felt incredible nervousness as her Mom and Dad arrived home.  She began thinking of what she was going to say, when suddenly the door to the bedroom opened and Kei staggered out looking a little dishevelled and disorientated, but definitely herself again.

"Oh Tomiko... I'm so sorry... oh no... what did I do?" she wept as she hugged her sister. "I changed back a few minutes ago and realised what I had done.  I was another person, it wasn't me... I'm not that slut Kelly... I'm so sorry"

"Shhhhh, it's okay... it's over now," sobbed Tomiko back to her.  Her sister was restored and she felt such relief.

The girls composed themselves and went to meet their parents.  Kei shivered as she saw the discarded pile of latex clothing and sex toys in her room... but it wasn't a shiver of disgust... it was a shiver of pleasure.  She had secretly loved every moment of being Kelly and had lied to her sister.

"Ohhhh nooo," she groaned "I don't know if I can resist becoming you again Kelly.  Oh Tomiko, I'm so sorry, but it feels so good."  Kei knew that she had to wait until school tomorrow and her parents were safely out of the way, to transform again.  She couldn't wait to become a bitch again and have fun.  Tomorrow she was going to school as Kelly and no one was going to stop her.

Her adventures as an evil white bitch, were only just beginning...

TO BE CONTINUED