Quote: I also ended up telling her that she wasn't a Christian and she was going to hell, along with the OM.
Well, that was a Christian thing to say???.
RB I understand the pain you are in. I understand the hopelessness you feel, that you think will be fixed by cutting off the problem, making it go away - unfortunately your problem (your wife's behaviour) is never going to go away because she is the mother of your daughter.
Whether you like it or not she is going to be in your life for at least the next 30 or 40 years - when your daughter starts school, when your daughter finishes school, at her graudation, at her prom, at her wedding, at the birth of her first children - your wife and you are both legitimately going to have a role in EVERY important achievement of your daughters life.
Perhaps you've decided you don't want to renew a commitment to your wife should she decide to leave the 20 year old - but there are 2 ways you can do it.
One is with anger, hate and unforgiveness - the other is with dignity, forgiveness and a loving heart. The later is what the DB principles will provide for you.
You want the best for your daughter yes? Please run with the later.
V
Never make someone a priority, who makes you an option.