Question: Assalaamu Alikum,
1. I would like to know if a non Muslim father in law is Mahram to his Muslim daughter in law?
Answer: Wa Alaikum As Salaam,
Yes, a non Muslim father in law is a Mahram to his Muslim daughter in law.
And Allah Knows Best.
Mufti Waseem Khan.
This answer was collected from DarulUloomTT.net, which is operated under the supervision of Mufti Waseem Khan from Darul Uloom Trinidad and Tobago.