Wendy was in her bedroom, mouth wide open in front of the dictaphone when...
She realized she didn't know what she exactly wanted. She had spent all the past years being jealous of her big sister about almost everything, and now, she didn't even know what she wanted. Vanessa was the one with dreams and ambitions, while Wendy had always been the one jealous of them. She realized she just lived, mind and body, in the shadow of her big sister. Even worse than she thought.
But what if she used this to her advantage? Why bother about finding her own desires when she could simply uses Vanessa's? And she'd be soooo jealous...
Wendy had the simplest, most perfect record she could think of. She took the dictaphone and recorded with an amused voice:
"I have everything Vanessa always desired for herself, and will always get whatever she desires."
"There." Wendy smiled as she pressed stop "Your dreams and ambitions with be my fuel now..."
She then heard a loud sparkling sound around her. And a strange feeling grew in her. She moaned and looked down: the floor was slowly looking farther and farther. It had started: she was growing. She bit her lips, giggling, eyes closed, as she fully accepted the transformation. Vanessa always wanted to be hot. So she was going to be, no doubt. And second after second, she could feel it: her hips pushing in her panties, her ass getting round, growing a bit into a cute peach, her breasts eventually growing to her joy, quickly getting into tiny hills, then nice mounds, outgrowing the size of all the girls her age, sending Wendy into another league, the one where older girls were competiting.
Because she was growing older.
She opened her eyes to guess she had to be 5'4, maybe even 5'5, getting taller and taller, two proud D cups expanding under her growing shirt. Her whole bedroom was changing along, pictures blurred as they were changing, posters turning into ones of new bands for older girls, and everything in the room turning into what belonged to a 15 years old girl.
And yet, she was growing older, taller, womanlier. She started panting as it was getting too good... way too good! Her body was turning more and more sensitive, and she was panting loudly now, trying not to cum. Her boobs had expanded to F cups, just like her sister's, even if she was still 5'8 and only 16 years old, from what she could spot on the changing framed pictures around the room.
"Mmmmgoood... soooomgoooood..." she moaned.
6'0 tall and her breasts were now obviously bigger than even Vanessa's. G cups? She could tell. She just knew she had two huge melons in there, stretching her shirt in the sexiest way. She couldn't see her feet anymore, and she loved it. Under her, her legs were spread away by the increasing gap between them, as her hips were still growing wider and sexier. She noticed her blonde hair were also longer now, and her face had turned sexier, or so she noticed on a picture of herself... now in the cheerleaders squad?
But wait, she wasn't done growing?!
Wendy expanded to an impressive 6'2, while the huge breasts on her chest simply didn't quit growing. She knew she was still getting older, and was getting worried about when it'd stop. But the problem was... the sensitivity of her whole body had increased again, and now, she couldn't stop it.
"Mmmmnooo!" she moaned as she fell on her knees, cumming, spurting juices everywhere.
She then fell to the floor, panting, feeling her body rubbing against the carpet as she was still growing. For how long? She was too exhausted to think about it, lost in her post-orgasm bliss.
Eventually, it stopped. And after a while, she found the energy to stand up.
Only to face a picture on her wall. Before, it was her a few months ago, for her 13th birthday.
Now, here was a blonde beauty, towering above everyone else in the room at what had to be 6'4, looking like some supermodel in a very cool white dress, hiding as it could her generous hips and stretched by enormous boobs, bigger than her own head, but looking perfect in every single way. And next to her were balloons, smaller than her boobs, but with "Happy 21st birthday, Wendy!" written over.
Wendy chuckled.
This was crazy. She groped her own breasts, and was rewarded with an awesome feeling as her fingers sank into her vast amounts of flesh.
"Thanks for dreaming big, Vanessa..." she whispered.