text: There is so much "wrong" going on here.  First of all I was one of those women who was contacting her "boyfriend" who was married.  His wife didn't know either and he kept it that way for a reason.  He was cheating on her.  Your husband is hiding something whether it is just cheating by phone or possibly more.  You already knew this though didn't you because you are becoming obsessed over this and for good reason.  Your answer is not to call his ex but to confront him.  How are you going to do this without telling him about how you found out?  I am not sure but there is so much distrust in this relationship and rightly so.  Trust me on this because I was the one calling and I am not proud of this but you really need to handle this now. Good luck.