Smile

"Becky, Is there anything in that book about how we could've possibly swapped bodies or, more important, how to switch back?" Tommy asked trying his best to sound sincere, "I've looked over the lab notes and haven't found any answers either!"

"Nothing yet!" Becky responded.

"Well, keep looking! I don't want to spend a minute more than I have to in your body."

As Tommy turned away, his dour expression morphed into a smile. He knew exactly how they swapped bodies, as it had been entirely his doing. He knew a way to switch back as well, but had no interest in doing so. He was only pretending to not like being in Becky's body to throw her off. Had he been happy, she would've been suspicious, so instead he devised a plan to ensure she'd be convinced the swap was an accident and that he was miserable in her body. They'd search for a while for a way back, but he had all his notes hidden far, far away.