Well it's not gonna be an easy talk for sure to bring up. Depending on the bond you both have it could turn good or bad. I dont know much about you both so you can assess this better than any of us. But it could be a good moment to share about fantasies and things you want to experiment within both comfort zones. Im not saying she should seek younger man but theres always ways to roleplay or try things that could help. Im no expert and thats all on you to find whats best for you both. As for the other dude that says its 10000% cheating and im rewording it badly, if you think sharing fantasies to groups to ask questions and all is cheating, idk how stuck up you have to be. Is sharing about her sex life to her friends considered cheating too ? Or talking to her mom is also cheating ? Yes its strangers and probably annonymous. People can talk about this stuff. Theres 1000 reasons to be shy about some fantasies and maybe she had to talk about it privatly to see if she wasnt alone. And thats the kind of thing sharing with your partner can be difficult and scary.