Being married to a woman and her paternal cousin at the same time
Q: What is the ruling on a Muslim called (A.M.S.)
who wants to marry his current wife's paternal cousin,
whose name is (S.M.T)?
The main criteria is that any two women who have the same Mahram (spouse or permanently unmarriageable relative) are prohibited to be married to the same man at the same time, in a way that if supposedly one of them was a man, they would not marry one (Part No. 18; Page No. 337) another. In this case, this condition is not fulfilled. Thus, it is permissible for (A.M.S.) to marry his wife's cousin, as the basic rule is the permissibility of having a plurality of wives and we do not know of any impediment to prohibit it. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.