Sorry about your pain. First of all, I would do some investigating. Sometimes people won't admit things when they are asked repeatedly. My husband did that for about a month, but then came and confessed the whole thing. Although I could have investigated and busted everyone involved with his secret life, I didn't because what is done in the dark will come to light eventually. I didn't have to go look, because he was truly with our friends, and the OW would be there also. You have been going through this for years, so I would sit her down and talk. Tell her that you want the truth and if she gives it to you, you will not get angry, but just listen and judge later on. I find that men will confess and tell what you want to know if they feel you won't leave or go off. Make a decision, if she tells you...check on it; if she says nothing...I'd be all in her personal life. It is called compartmentalization. She lives a seperate life from you. I'd find a way to monitor calls, ask her where she is going--demanding her to call with info when there is a change in plans, and of course...have the car and be checking up on it. I mean...getting her friend's numbers, checking up on some addresses, and popping up. Excuse for her giving you some names and numbers...in case the cell is off and there's an emergency with the kids. If you do some of this, you must be prepared for turmoil if she's still out there cheating. Pray for what you should do, and ask God to let her slip up and it comes out on it's own so that you don't have to go look for yourself. I have done this in my past relationship, but because of that...I didn't have to investigate in my marriage now. Everytime he did something...I always knew. It was intuition that told me when, who was present, and where to look if I wanted to. So trust your gut...it works.