Thanks for the reply. They worked together, she does know the wife but is not close with her. After my gf left her work she was divorced shortly after and they began this close friendship. I don't have any suspicion that my gf has had sex with this man and I really don't think she would. But still, it bothers me that this guy's wife is home while her husband is talking on the phone multiple times a week to this single attractive woman. It also bothers me that my gf is at least being intellectually dishonest and saying there is nothing wrong with talking to a married man so often. It kills me because I really like her and could see myself with her. And again..I don't think she has done anything with him at all.