I found myself in the unfortunate position of finding out I was the OW. I met a man through OLD, 2 months later, I found out that he wasn't actually separated from his DW. We were messaging daily, seeing each other a few times a week and had spent the night together. He gave me a false name which I found out about through having my suspicions and putting pieces of information together I managed to find out he was married and who his DW is.
I think the extent of the deceit is astounding and feel really sorry for his DW who surely can't know. I don't think it's fair that he carries on like this. What would you do in this situation?