Impermissibility of marrying the daughter of a wife divorced after consummation of marriage

Question 6: Please advise us about a person who married the daughter of his divorcee, is this permissible?

Answer: It is not permissible for a man to marry the daughter of his divorced wife if he consummated his marriage with the mother, since she is considered his stepdaughter. Allaah prohibits men from marrying their stepdaughters. Allaah (Exalted be He) says when showing unmarriageable persons from among women… read more here.