Image imported from derpibooru 
Original Description:
 
Twilight needed more, wanted to learn more. What made a proper member of Ballers and why did she want to achieve it so much? The feeling made her warm down below as things started getting bigger there too.
 
Letting her magic hold the book, she carefully examine one passage about pectorals and pride in them. That sounded great, showing off her… wait, she didn’t have pecs. She just had boobs… which were quickly becoming less and less desired.
 
However, the issue would soon correct itself. Soon, Twilight had proper pecs, hairy ones at that. They liked it. They liked it a whole lot.