John was taking his time not changing things all willy nilly right away. He was just enjoying a cute naked girl in the passenger's seat. Then they got to school, and Kylie was somewhat covering herself but not a lot as no one else was staring at the naked woman in the middle of school. When the two got to their shared class Kylie went to her purse to double check that her phone was on silent, and found a remote with a single button. Her brain automatically asked the question "What does this button do?" and automatically pressed the button, and suddenly found herself clothed in John's car. John then turned on the engine and Kylie asked "What the heck happened?"
John playing dumb asked "What do you mean? I just turned the car on." Kylie went back to her purse and found the remote was inside with that single button and John asked "Say what does that button do?"
Kylie said "I pressed it in class and then got sent back to just before you started the engine. Maybe this is what turned me into a woman? Maybe it's mentally linked so..." She pressed the button again and John got an idea. Kylie noticed that the engine was off, and then John turned the engine on... then suddenly *rip* went some cloth and Kylie looked down at herself and saw her breasts had doubled or maybe even tripled in size and broke through her shirt. "Fuck! I didn't want to be MORE OF A WOMAN!"
John asked "What do you mean Kylie? You're still your regular cute girl self."
"Of course you don't notice my tits are now resting on the dashboard..." Kylie dug the remote out of her purse which was a little harder with her breasts in the way and said "I just want to go back to before this happened." and pressed the button. A massive weight was lifted off Kylie's shoulders and she was still Kylie instead of Kyle. Then John turned the engine on, and then reality seemed to shift. When reality seemed to settle Kylie looked around and saw her chest was flat, but she was wearing a dress... and she seemed to be in an SUV. To her left was some kid who reminded her of John and that was John's mother in the driver's seat wasn't it?
John's mom said "Well then Kylie ready to go to school?"
Kylie said "Yes?..." unsure how any of this was "going back to before this happened." as he only met John in college and for sure was never a little girl. She looked in her backpack that was at the floor and noticed the remote. Was she going to press it though? What if something else happened?