Unbeknownst to Jayden, Derek snatched the coin and tries to change back.

Derek smiled as his friend left the room, but not for the reason Jayden thought. Sure, the hormones and thoughts this body was giving him were pushing him towards being attracted to men, and that particular man especially. But Derek wasn't just going to lose himself to these changes, not if he could help it. That's why, while their hands were all over each other, Derek had slipped into Jayden's pocket and snatched the silver coin, without Jayden even noticing it was happening.

Now that he had the coin, the question was how to use it. Jayden was of multiple minds about the issue. Part of him wanted to just go back to who he used to be, but other parts weren't sure that was the best idea. More and more, Derek was finding he loved being an adult, and being a teacher as well. Maybe he could go back to his old gender, but keep the age and job? But then another part of him was getting really attached to being a woman, so maybe he could just retroactively end that relationship with Jayden, and keep every other part of the changes?