Need advice for a friend, quick!

[Lady Sidhe]

Ok, I can answer some of the questions:

First, I AM friends with the guy, I've known him about as long as I've known her. He was married before, and since he was in the navy, he was out at sea for six months to a year at a time on a sub. He said he never cheated on his wife during that time, but his wife divorced him because he was never home.

His history: let's just say that before I became friends with him, all of his friends warned me away from him. They said that all he wanted to do was sleep with me. He slept around a lot.

Third: when he and his wife had the conversation about this girl before, he said that he would stop hanging around her, so actually, he IS doing it behind her back.

And I personally think that taking another woman, whom you'd promised to stop hanging around with, for coffee, when you complain to your wife that y'all don't have enough money for the bills, AND let her hang all over you, is WRONG. Whether he's doing the dirty or not. His wife's feelings should be more important to him than this girl. His wife makes sure he knows all of her male friends, and doesn't hang out with them unless he knows about it or is there, because she wants him to know he can trust her. However, he goes out with his friends, some of which include ex-girlfriends, and never invites his wife. I think something fishy is going on, especially since he doesn't want to talk about it.

Sidhe