It's a painful situation, but I believe the Lord never gives us a burden heavier than we can bear. This is the truth we must accept. Therefore, in this case, I would advise simply to offer this painful situation to the Lord, in a spirit of reparation for all the sins of the family, for their sins, and for the conversion of the husband so that he, at least before he dies, may truly repent.
This would already be a great act of grace on the part of the lady when she does this. Trust in the Lord, accept it with faith, and say, "My Lord, I accept that You will not give me a burden heavier than I can carry." These offerings will help and make the burden a little easier to bear. Then, simply pray confidently every day, especially the Rosary, for the strength and conversion of the husband, and to forgive him as God forgives us every day, trusting in the Lord.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!
