I caught my 41 y.o. mom cheating on my dad...with some 60 year old. what do I do?
I am so sorry. Did  you think about exposing them?
Yeah, it really bothers me, does it make sense to tell him?
I'm so sorry that your mom cheated on your dad. You shouldn't have to live with this secret. Your dad will be thankful if you go ahead and tell him.
Does it confirm his suspicion?
I don't know if he suspects but you should not even be in this position to begin with. It isn't right for your mom to try and make you keep a secret. You should tell her she should tell your father.