Ruling on Sin Between Son-in-Law and Mother-in-Law in Islamic Law

❖ Question:​


If a son-in-law commits adultery with his mother-in-law, what is the ruling regarding his marriage? Will he receive the punishment prescribed for a married adulterer?


❖ Answer by Shaykh Abdul Wakeel Nasir (حفظه الله):​



✅ Ruling on the Marriage:​


In such a case, the son-in-law's marriage with his wife will remain intact.


📚 Evidence:​


The statement of Sayyiduna ʿAbdullah ibn ʿAbbas (رضي الله عنهما):


"إن الحرام لا يحرم الحلال"
["What is unlawful (ḥarām) does not make what is lawful (ḥalāl) unlawful."]
[Irwāʾ al-Ghalīl]


This means that an act of sin does not nullify a valid marriage.


⚖ Prescribed Punishment:​


The son-in-law will receive the same punishment as a married adulterer, as per Islamic legal rulings.
 
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