Jeff always made fun of his younger sister for her bust size as her body developed during high school and mocked her for her love of MLP as a grown woman, so one summer break back home from witch college she decided to teach him a lesson.

Living life as a young Fluttershy forced to experience 10 years of female puberty in the space of just 3 months wasn’t easy, to say the least, and fending off all the endless unwanted male attention ever-increasing as she “grew up” wasn’t making things any easier. By August, lugging around a fat pair of M cups bigger than her head was already getting exhausting, and she had lost count of the number of times random jerks had tried to slap her overgrown ass in public without permission. Jeff couldn’t wait to return to her old male self in September – but… just one slip-up sexual encounter and she could wind up pregnant and trapped by the rules of magic in her new unwanted body forever!