Yeah, I can't imagine having that on my conscience for the rest of my life. In my case, OM is a man who was aggressively coming after my W when she was still living at home with me and our three little kids, all of which he knew about. Now I know my W was just as guilty, and was feeding him a bunch of lies about the state of our M, but she was very troubled. Why didn't he say "I'm flattered, but I don't want to get in the middle of your marriage. If you decide to leave, and you get your head clear of all this, give me a call and we'll see"? Because he's a lonely coward, who took advantage of a troubled woman.