Hide and unfreeze her

You duck into her closet, peeking through the slits on the door. In your mind you unfreeze time and Julie comes back to life. Immediately she flails her arms and falls back onto her pillow cushion ass. In disbelief she gropes her behind. "What the fuck happened to my butt? It's so fucking fat now!" She awkwardly gets back to her feet and gets in front of her mirror. For a few minutes you watch as she examines her ass, picks the underwear out of her crack, and tries to find clothes that will fit her now.

Eventually you grow tired of this, she's taking it fairly well. You freeze her again and try to come up with another way to fuck with Julie. You bring up the list of possible changes in your head and one catches your eye.