Does your wife want to work torwards reconciliation?
I wonder if with the new relationships, it is easier to communicate because the past hurts and resentment aren't there. You mentioned new girlfriend was divorced once as well? I am sure she has learned and reflected upon (like myself) how not to communicate with a boyfriend/husband.
I wonder if with past relationships, we learn from our mistakes and are able to implement improvements with the new relationships. Kind of like starting out with a clean slate. Or if we just haven't had time to hurt each other yet. And if miscommunication, laziness, taking each other for granted is inevitable.?