If the mother suckled you 5 times or more when you were below 2 years,
you are her son and all her daughters are your sisters. Therefore,
this girl is your niece and you can’t marry her.

I have a foster sister with whom I have shared her mother’s milk. As to my knowlwdge I cannot marry her. She has elder sister also who is 20 year older than her. My question is that can I marry the daughter of this elder sister. In short can i marry the niece of my foster sister?

Breast Feeding, Mahram |