The Ruling on Siblings through Breastfeeding Among the Children of a Sister

Question:
My mother breastfed my son along with my younger brother, and my eldest sister breastfed my younger sister along with her middle son, and my middle sister breastfed my youngest sister along with her middle son. Is it permissible for all my children and the children of my eldest and middle sisters to be considered siblings, or what is the ruling? I note that I have not breastfed anyone. May Allah reward you with good.

Answer:
The children who were breastfed by one woman, whether from your mother or from one of your sisters, if they received five breastfeedings or more within the first two years, they become siblings. They become siblings through breastfeeding, whether they were breastfed by your mother or by one of your sisters; they become siblings through breastfeeding. The one who was breastfed by your mother becomes the maternal uncle of all the children of her daughters; because he was breastfed by their maternal grandmother, he becomes their maternal uncle. Yes. May Allah reward you with good, and may He do you good.