If a sister breastfeeds her brother’s son, does marriage between her son and her brother’s daughter become forbidden? And does her son become a brother to any new daughter her brother is blessed with?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
If your nephew suckles from you, he becomes your son through fosterage and a brother to your children. As for the rest of your brother's children who did not suckle from you, they are not considered your children through fosterage, and your son is permitted to marry them.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/160673
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 160673
- 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