Muhaqqaq Masala

In some areas, it is a custom that a woman who does not have any brother makes a strange man her sworn brother; similarly, a man who does not have any sister makes a strange woman his sworn sister, and by giving this sworn brother or sister the status of a real brother or sister, Hijab (purdah) is also not observed with them, whereas in Shari'ah, a sworn brother or sister has no status, they are strangers, and observing Hijab from them is necessary. (Aham Masail / Vol: 6)