asalamualaykum, Is my wifes sister my mahram? Is my wifes mother my mahram? Please give detailed explanation. JazakAllah Khair
Answer
(Fatwa: 1131/923=L/1430)
Sister of wife (sister in law) is non-mahram, one should observe hijab.
Mother of wife (mother in law) is mahram.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband