This might be a good point, just to thank her. Offer no more options, alternatives, solutions, course of direction. She already knows where you stand on that and she has made it clear where she stands ... but have you ever thank her sincerely for the part she played in who you are today. Think about it ... if she hadn't made taken the course of action that had lead you here, would have made the amount of progress towards improving yourself that you have by buying into the DBing principals and applying them to yourself?
This is not off the cuff. At a time when W was displaying alot of anger towards me (altho not at the level of persistance yours seems to have taken it and is holding onto it), I did thank her. I kept it short, but felt I should let her know that no matter what road we go down that I felt a debt of gratitude for forcing me to face myself in the mirror, because that has allowed me to make the changes that will change my life for the better. I don't care if she doesn't if she believes if it is all a bunch of hooey or not. I will continue to act in a way that I feel good about. I just wanted to share that she played a part in my turn around to feel better about myself and I just want to say "Thank you for that."
She mulled it over for a while and afterwards her confrontation attitude towards me began to ease.