Does marriage to a woman prohibit her mother or daughter from being married to the husband's father or son?
Chapter on What is Prohibited to Marry and Combining Between Them and Other Matters
Al-Mughni
Book of Marriage
Primary text
Marrying a woman does not render her mother or her daughter forbidden for the husband's father or son. If a man marries a woman, and his son marries that woman's mother, this union is permissible due to the absence of any established legal impediment to marriage (asbab al-tahrim).