Can a man marry his niece through breastfeeding ties?

Q 1: A woman died in her postpartum period, so her son was raised by his maternal grandmother who was not breastfeeding at that time, but she had milk at that time and she breastfed him for two years. Can this man marry his maternal uncle's daughter, given that his uncle is his foster brother? (Part No. 21; Page No. 115)  A: If the situation is as you mentioned, this man is considered his uncle's foster brother and his cousin's foster uncle. Thus, it is prohibited for him to marry her, according to Allah's saying, Forbidden to you (for marriage) are: your mothers, your daughters until His saying, ...your brother’s daughters, your sister’s daughters The Prophet (peace be upon him) also said, Foster relationships are equal to blood relationships in rendering marriage unlawful. Q 2: A man married a woman and had a child, and she breastfed another child at the same time. This woman died, and her husband married another woman. Is it permissible for the second wife to unveil her face and shake hands with the man who was breastfed by the first wife?

A: If the situation is as you mentioned, this man is considered his uncle's foster brother and his cousin's foster uncle. Thus, it is prohibited for him to marry her, according to Allah's saying, Forbidden to you (for marriage) are: your mothers, your daughters until His saying, ...your brother’s daughters, your sister’s daughters The Prophet (peace be upon him) also said, Foster relationships are equal to blood relationships in rendering marriage unlawful. Q 2: A man married a woman and had a child, and she breastfed another child at the same time. This woman died, and her husband married another woman. Is it permissible for the second wife to unveil her face and shake hands with the man who was breastfed by the first wife? A: If the situation is as you mentioned, the man who was breastfed by this woman is considered her husband's foster son, provided that Breastfeeding occurs five times or more in the first two years. Thus, he is considered a Mahram (unmarriageable relative) for any woman whom this man marries, whether before or after the one who breastfed him. It is lawful for her to treat him like one of her Mahrams, such as unveiling her face in front of him, Khulwah (being alone with a member of the opposite sex) with him and traveling with him. Q 3: A woman was breastfed by many women in her childhood. Is it permissible for her husband to shake hands with all her foster mothers? (Part No. 21; Page No. 116)  A: If this woman was breastfed by each of those women five times or more in the first two years, her husband would be a Mahram for all these women. It is lawful for them to treat him like one of their Mahrams, such as unveiling their face in front of him, Khulwah with him and traveling with him.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.