As I have been in the position of the wife I can only give my experience of similar situation. I found out about my husband through a friend but she was the kind of friend who only had my best interests at heart. The fact it came from her made it easier for me to handle but to have found out from someone I didn't know or not very well I don't think would have been as easy to handle. So I would advise to stay out of it. 7 years later the friend who told me is still my best friend but even to this day when we talk about it she still apologizes and I then have to spend ages telling her about how she did me a favour!!!
