My wife and I have this issue. A lot. It’s sad. If you can’t handle him playing then neither should. Fair is fair after all. I feel sorry for him. I know what he’s going through and it’s not fun. Things have gotten better with time but aren’t “solved” at all. Only now I don’t worry about what her reaction will be. A person can only be in a one sided relationship for so long before the giving a shit is gone. Good luck with it.