Hi, I agree with David BJ and would add one thing. The distinctive addition to the Law of Moses by Jesus the Christ, Incarnate Word of God, God Himself is that marriage is indissoluble (St Matthew 5:32). Therefore, it’s not divorcing but remarrying, or concubinage and adultery in your wife’s case, that is the problem. You refer to her as your ex-wife. The radical, challenging teaching of Christ and His Church is that there is no such thing as an ex-wife. Either your marriage was valid, in which case she is still your wife, no matter how reprehensible her behaviour, or, you never were married. For your own life and conduct it seems to me vital that you discern which is the case. This is indeed a hard saying and my only comfort is to offer you the example of St Thomas More, who died for the indissolubility of marriage- it is a truth of Christ which is worth living for and worth giving your life for, either at an instant, like St Thomas More or gradually over an extended period, like a libation. In this situation, you are sharing in the Hosea experience of God, the faithful husband of the Church, his often wayward wife. I hope this is of some help, although it’s not easy to live with.