What is the nature of the relationship between a wife's sister (brother's wife) and a brother in Islam? Is it permissible to call the wife's sister "my sister" and treat her as a sister?
Source: FtawySummarized from the full answer at Ftawy · imported Sep 2, 2026
It is not permissible to treat one's brother's wife as a sister because she is not a . Therefore, it is not permissible for her to appear before you without the shar'i , nor is it permissible to be alone with her (), or to shake her hand, or to look at her, or to speak with her except from behind a veil if there is no fear of fitna. This is because Allah has forbidden believing women from displaying their adornment except to specific individuals, as He says: "And let them not display their adornment except to their husbands or their fathers..." (Qur'an 24:31).
Summarized from the full answer at Ftawy · imported
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- Ftawy
- Original fatwa ID
- 6377
- Imported
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