Dude,
I truly feel for you. You sound like a nice guy and good father( to her child too). This has to be devastating to you. How do you ever trust a person after something like this happens. Whenever she's late, or somewhere you don't know about , you're going to wonder if she's up to something else. She basically told this guy" hey I'm drunk and high and I'll be right over there naked and squeeky clean in just a little while"... It's hard to blame him too much, you live on different CONTINENTS.Does counseling help at times like this? It can't hurt, even if you go by yourself.Do you use the "get laid free card" she's handed you? Maybe. Children are involved, that's the killer. If it were just the two of you, it would an easy answer. RUN. But this is something that's going to be eating at you like a cancer. I hope it works out for you. She didn't get caught, she TOLD you. Maybe she was feeling you out for a swinging/open relationship. Otherwise she would have told the guy to go to hell with his "helping" hand. Good luck and GOD bless you.