Regarding Breast-feeding
Question :
I have a wife and I have eight daughters from her. She has a sister who is fifteen years younger than her. Someone was breast-fed by her mother, and so he became a brother to her. My problem is that my daughters say that he is their maternal uncle through breast-feeding and they remove their veils in front of him, and I forbid them from doing that, but they refuse, so I ask your advice, and may Allah reward you with goodness.
Answer:
If the aforementioned man was breast-fed five times or more by your wife's mother, or by the wife of her father while she was under the authority of her father and he was in the first two years of life then he is a maternal uncle to your daughters through breast-feeding. Based upon that, it is permissible for them to unveil themselves before him like the rest of the Mahrams and to be alone with him, according to the saying of the Prophet ﷺ:
"That which is forbidden due to kinship is forbidden due to breast-feeding."
This is if there is no doubt or suspicion to forbid seclusion with any of them.
Source:
Ibn Baz
Fatawa Islamiyah, Vol. 6 Page 118
أرسلها على تطبيق الواتساب 