Question
Our grandmother breastfed my maternal aunt’s son and my maternal uncle’s daughter. Is nikkah (marriage) permissible between the cousins?
Answer
Since both cousins drank milk from the same woman, they have become ‘milk’ brother and sister. Nikah between them is now eternally prohibited.
Allah knows best
Mufti Siraj Desai
Darul-Uloom Abubakr