Q: If my mother had children out of wedlock, are these children considered to be my siblings according to Islam? Am I responsible for them as the older child. We have different dads but my mom was married to my dad.
A: Yes, they are your akhyaafee (consanguine) siblings.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)