Marrying a woman and her paternal or maternal aunt at the same time

Question 2: One of the readers from Makkah asks: Is it permissible for a person to marry his wife’s niece?

Answer: It is not permissible for one to marry his wife’s niece, whether on the maternal or paternal side, if he is still married to her aunt. The Prophet (peace be upon him) has prohibited marrying a woman and her maternal or paternal aunt at the same time… read more here.