Yes, I did call out a friend who was talking to a M man years ago. Told her karma was a bitch and to put herself in his W's place and decide if it would be ok with her if her H was "talking" to another woman.
Another friend came to me when he reconnected with the "love of his life" on FB and was thinking about leaving his W. I told him that he made the commitment to his W and that includes doing everything possible to work on that R. If they couldn't work out their problems then D and see if the old flame is really his soulmate. He thanked me for the advice and resolved to have the difficult discussion with his W. We haven't talked about it since because it would be inappropriate so I don't know how it went. But it was almost a year ago and I know he is still with his W.
If you love somebody, set them free. http://tinyurl.com/2empx2g
I noticed my W stopped contact with almost anyone (except her parents) that would have disagreed and stood up to her on her affair. She is only now reconnecting with those old friends.
A single woman friend of mine was contacted by an old friend (not boyfriend) of hers from college, who is unhappily married. He was clearly interested in connecting, and started doing all sorts of flirting via text message, e-mail, and FB. My friend was amused by all this, and was having fun responding to these messages.
Although she is the single one in the sitch, I did call her out, and told her it was not appropriate. She tried to defend it, saying "Oh, it's just harmless fun." I replied "Do you think his wife would think it was harmless fun?" She admitted "No, she wouldn't."
Amazing how clueless people can be sometime. Her friend sent her a message saying he was recently in town. She responded with feigned annoyance "Why didn't you let me know so we could have gotten together to catch up?!" I just shook my head and said "Why do you think he didn't tell you? He was here with his wife!" My friend again cluelessly nodded and said "Oh yeah, I guess so."