Is it permissible for a woman to breastfeed her brother or her husband’s brother if he is an infant, and what are the implications of that? Does the husband’s brother become like her son? Are there individuals whom a woman is forbidden from breastfeeding?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
It is permissible for a woman to breastfeed her brother or her husband's brother, and this does not affect her marriage. The suckling becomes her son through breastfeeding, and mahramiyyah (prohibition of marriage) is established because of it. The Prophet, peace and blessings be upon him, said: "What is forbidden by lineage is forbidden by breastfeeding." There is no one whom it is forbidden to breastfeed.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/50349
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- Ftawy
- Original fatwa ID
- 50349
- Added here
- . This is when the answer was added to El Fatwa, not the fatwa's date.
- Text
- Summary from Ftawy's records, reviewed by El Fatwa's sharia committee.
- Read the full ruling
- Read the full answer on Ftawy