Does the husband of the wife's sister become a mahram to her if the wife breastfeeds to the point of satiation from her sister, and do the brothers of the sister's husband from fosterage and others become mahrams to her?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
If a sister breastfeeds her sister five times within the first two years of life, before weaning, the latter becomes her daughter through suckling. The sister's husband then becomes her father, and the husband's brothers become her paternal uncles, based on the Prophet Muhammad's (peace be upon him) saying: "What is prohibited by lineage is also prohibited by suckling."
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/37032
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 37032
- 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