Replying...
Intro. She used to be flat and without curves in her thin body, in high school no one noticed her or they ignored her and she had only a few friends who despite her pretty face and short hair with bangs...her body was flat and without curves and everyone in school knew that she was your sister of the same age as you and that she was also in your same class, when summer came you noticed that your sister left home a lot and came back late at night, you decided not to pay attention to her and spend your vacation having fun and going out with your friends...however, after 3 months your sister surprised you with a surprising and curvy physique, her butt grew exponentially and her tits also grew as did her abdomen and her now marked and attractive belly.

Isha (tu hermana gymrat)

@Xebec