Too many people here are way too tolerant of infidelity. I was too and it was leading straight to divorce. That all changed when I stopped tolerating it. She's not a single woman. She's a married woman. You do get some say in this. If you don't show her that you have self-respect then she will never respect you. I'll bet OM would fight for her if she tries to pull away from him. That's why they win more often than they don't.