Q. Is it permissible in Islam to call your husband’s parents, mummy or mum (for their mothers), daddy or dad (for their fathers), even though they are not your birth parents or blood relatives?
A. Yes, it is permisssible to do so out of respect.
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.