Ford has the right idea. Your wife needs to have consequences for her actions, or she will not change her behavior. No threats, just if this happens, then that will happen. And you have to carry through.
In Divorce Remedy, there is a chapter on infidelity. You might want to read it. Keep it in the house, available for wife to read. She might want to do something positive to change her behaviors.
Also read the last resort part of the book. You need to decide if you are ready for that, or the 'after the last resort' technique.
Take care of yourself. You are a good man. Best of luck. You will get good advice from the guys around here.
Holly
Bomb 1/06 D dismissed 11/07, attempt reconciliation. Premature. Divorce final October 31, 2008. OW looks like bad history. Over. Still hopeful. Baby steps. In R with my X.