Wife cheating, should I tell adult son?

[MrBond]

I'm going to go against the grain and say that it's okay for your son to know. After all he is a grown man, he lives at home and so he's going to have questions.

You don't have to give him details, but I believe that telling him something like "mommy and daddy don't get along" isn't going to work. He now has a say as to how things are going to go because this affects him too.

You don't have to get into the emotions you're going through. For that you get a therapist. So for me, I would sit him down and have a man to man.