The brothers and sisters of the husband of that woman who is...
The brothers and sisters of the husband of that woman who is the owner of the milk, although they be (brothers and sisters) by breast feeding. The paternal aunts and uncles and the maternal aunts and uncles of the husband of that woman whom he is the owner of milk, although they ascend (the family tree) and though they be (is uncle or aunt) by breast feeding. Likewise, there is another group whose mention will be forthcoming in the attached issues.
They will all become a close relative (Mahram) to the child who that woman had breast fed by reason of breast feeding. Issue 858: When a woman breast feeds a child with the conditions whose explanation is upcoming, it is not permissible for the parents of that child to marry the children who are born from that woman. Likewise, according to obligatory precaution, it is not permissible for them to marry the children of her husband who is the owner of her milk.
Rather, the precaution is that they not marry with his children by breast feeding. However, there is no objection nor anything preventing them from marrying the children by breast feeding of that woman from another husband. Issue 859: It is not allowed for a woman to breast feed the child of her daughter with a complete breast feeding because she would become forbidden for her husband by that. And it could become a cause of a great scandal.
It is likewise when she breast feeds a child for her husband's children by another wife. However, there is not preventing her from breast feeding the son of her son. The Conditions of the Prohibiting Breastfeeding Issue 860: When a woman breast feeds a child, the breast fed child becomes a close relative (Mahram) with nine conditions, they are: That the milk be from childbirth.
Due to this, when milk is taken from the breast of a woman without the birth of a child, then, she breast feeds a child, the breast fed child does not become a close relative. That the breast feeding of the child be from a living woman. When the breast of a deceased woman is placed in the mouth of a child and he suckles milk from, the breast fed child does not become a close relative. That the milk (not result from) an unlawful (relationship).
When a child is breast fed from the milk of a woman connected to child born from fornication, it does bring about a close relationship.