Can your foster sister’s son travel as a Mahram with you for Umrah? 

Q. A lady in my community wishes to leave for Umrah with her foster-sister’s son. Both sisters were breastfed by one woman. Is it permissible for her to go for Umrah taking her foster nephew as her Mahram? 

A. Your foster-sister’s son is considered to be your foster-nephew. Accordingly, your foster-nephew is a Mahram to you and hence, he can accompany you as your Mahram for the purpose of Umrah. (Mahmoodiyyah 17/40)

Allah Ta’ala Knows Best

Mufti Ismaeel Bassa