Q:
A man married a man's daughter, is it permissible for him to also marry the daughter (Part No. 18; Page No. 340) of the man's sister at the same time?
A:
It is permissible for a man to marry a woman and her paternal cousin at the same time; there is no sin in that. What is Haram (prohibited) is for him to marry a woman and her paternal aunt or her maternal aunt at the same time. May Allah grant us success. May peace and blessings be upon our Prophet, his family, and Companions.