If this was happening to your D, how would you counsel her?
Sorry, I missed this question.
I am going to be 100% completely honest. If my D was going though this EXACT scenario, I would suggest to her that she really try to work on the marriage. She has a husband that is willing to try. He is supportive of her position and owns up to his personal mistakes he made during the marriage. He also wishes to fix them. I would then advise her that she has a whole lot to lose by not making an effort....basically exactly what her own parents have told her.