Q: I want to marry the wife of my father-in-law after his death.
Is the wife of my father-in-law lawful for me?
It is worth mentioning that she is not my wife's mother and does not have blood relation with her. Does she fall under the prohibition of combining between a woman and her aunt or not, as we call the mother-in-law 'aunt'? It is worth mentioning that the wife of my father-in-law suckled one of my children before; does this suckling prohibit me to marry her? Appreciate your guidance, may Allah guide you!
There is no harm in your marrying the wife of your father-in-law, who is not the mother of your wife, if there is no prohibiting suckling between you two. The wife of the father-in-law is not an 'aunt' to your children from another woman. It is a common practice among people to use such titles as a way to honor the person; however, she is merely a stepmother. (Part No. 18; Page No. 360) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.