The ruling on the children of the second wife if the breastfeeding was from the first wife

Our brother, the listener, Wasi' Salim al-Farsi, sent a message saying: A man is married to two women and has a neighbor. The neighbor’s wife passed away, leaving behind a small daughter who was still nursing. The neighbor gave the child to the man’s first wife, and she breastfed her until she completed the breastfeeding period from the first wife. Does this daughter become a sister to the children from the second wife, or not? We ask for your guidance.
Answer: Yes, if a man has two, three, or four wives, and one of them breastfeeds a boy or girl within the first two years for five breastfeedings or more, then this breastfed child becomes a child of the husband and a brother to his children from all the women; he becomes a brother to all of their children. However, the children of the woman who breastfed are full siblings to the breastfed child, while the children of the other wives are siblings on the father’s side, because the father is the same.
The woman who breastfed the child is a sister to the breastfed child through breastfeeding, from both his mother and his father, while the remaining children from the second, third, or fourth wife are siblings on the father’s side, just as in blood kinship, as the Prophet (peace and blessings be upon him) said: .
The children of the wives who did not breastfeed the child are siblings on the father’s side, just as in blood kinship, just as their children from this man are siblings to the other woman’s child through blood kinship on the father’s side. Yes.