Should I tell her I know?

[addie]

If you confront her it will most likely push her further away from you. That's what happened with me. I couldn't ignore what was going on (I also was snooping). I kept confronting H and pushed him right out the door. He is now actively pursuing PA with OW (if it hasn't happened already). Having said that, I had a very hard time detaching from H while he was still living here. Now that I exposed A, I have been able to detach, regroup and get on with DB. I would not recommend this approach to everyone though. If you can live with the knowledge that she is having EA while the 2 of you are in the same house, then don't confront her and actively DB.