Does a son's brother through breastfeeding become a brother to the wet nurse's children?

The questioner : The issue of breastfeeding is now, for example, a brother and his brother, both living in the same house, married, and they have children. When, for example, this one gives birth to a boy and the other one also gives birth to a boy, this one breastfeeds this one's son and this one breastfeeds this one's son, the two breastfeed each other's children; this one breastfeeds this boy and this one breastfeeds this boy, and the breastfeedings are sufficient... So the children grew up here, or the boy and the girl grew up, these are brothers to each other. So what about the brothers who came after them and did not breastfeed them? Are they also their brothers?

The Shaykh : This is known in detail. For example, let us suppose Fatima has a daughter and we do not increase the number, and Aisha has two male children, one of whom breastfed from Fatima, so he became her son through breastfeeding, while the other did not. And on that basis, reverse it: suppose there are two daughters and a son, one of the daughters breastfed with the son from the mother, and the other did not breastfeed; the other is not a sister.

The questioner : To the brother.

The Shaykh : Yes, exactly. And in this, one observes the sharing in breastfeeding from the wet nurse. Whoever among the children shared in it became her son, and the others did not.

The questioner : May Allah reward you with good.