Are the father and mother considered siblings through fosterage, given that the father was suckled by the mother's grandmother, and what is the ruling on their marriage and the fate of the children in this situation?
If a man's suckling from his wife's maternal aunt is established, he becomes a brother to his wife through suckling, based on the Almighty's saying: "and your foster sisters." So, if a child is suckled by a woman, she becomes his mother, and her daughters become his sisters, and everyone suckled by her becomes his brother, whether they were suckled with him, before him, or after him. Similarly, if a girl is suckled by a woman, she becomes her mother, and a sister to all the wet nurse's children and everyone suckled by her. Based on the establishment of suckling, the husband and wife are separated, and their children born before their knowledge of the suckling are attributed to their father and inherit from him.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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