The great change begins: Big Sis

Little sis is his dessert. With mom at work that left....

John grinned a little as they walked down the stairs knowing he was about to get a sample of what was to come. His big sister wasn't really that bad, a little plain and ordinary but not truly bad to John. He was going to make her his, and he didn't really care much for the consequences.

Erica Doe waved at the pair of them from her bowl of muesli. She was a pretty good looking girl, the same scarlet hair that Melanie possessed was set into a short pixie cut that suited her seemingly innocent face. John grinned resolving to watch this transformation as he snapped his fingers and watched his sister’s innocence drip from her body.

Her face would remain the same, save for the slight beast fangs that now nipped the corners of her lips, if John was going to usher in a new era he was going to start with a bang.

Erica’s ears disappeared sliding upwards to form two pointed crimson peaks on top of her short red hair. She let out a groan of surprise as her breasts began to balloon outwards stretching her workout tank top obscenely before a snap destroyed her bra.

The bowl of muesli tumbled from the table at the top-heavy girl’s sudden expansion, John continued to grin as his sister expanded and burst from her top. Tearing the tattered remains of it to free her sizable bust. As she leaned forward the rear also began to fill out, her previously tight rear becoming a bouncing bubble butt in record time, but that was only the beginning.

Erica let a grasp as orgasm overtook her, a surprising sensation as her tailbone and naturally lengthened spitting a scarlet length that curled around her leg provocatively.

John felt his erection tighten knowing the transformation was almost complete, what a previously been a somewhat plain redhead in shorts and a tank top was now a very horny cat girl in **** need of milk.

He watched in real time as his changes overtook her, he wasn’t going to change her personality so much as add to it. In addition to being a cheerful kind and pleasant person she was now an insatiably horny feline as well.

Both he and Melanie stood there watching as his older sister began to play with herself at the kitchen table mewing and craving fulfilment.

John grinned, he had made one more change to both his sisters, while they were fully aware of what was happening to them, they would never realise he was responsible.

John watched in amusement as the angel rushed to see to her lustfully transformed sister and John wondered to himself if now was the time to start Erica on a litter of kittens.