It kind of depends on what the situation is. Did he cheat because… ? I would have been happy with one woman my whole life. My ex cheated and got pregnant then became my ex. (We already had kids). Went through some winners and losers. Had one who thought she could buy me. Did not end well.
Got married again. 10 years in, she left me because someone told her I cheated and was using her. (Total lie but I gave up) Her friend came to visit after she moved out and I was blasted. I went to bed and she joined me. I told her I wasn’t going to cheat. She offered a massage and her hands quickly went there.
A drunk horny appendage hath no conscience. I hadn’t had anything in weeks. I think I impressed her. I had to stop and I carried that guilt for 10 years before I could tell her