If a woman has intimate relations with her sister’s husband, does the nikaah break between the sister and the brother in law?
In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykumwa-rahmatullāhiwa-barakātuh.
If a man commits adultery with his sister in law, his marriage to his wife will remain intact. It should be remembered that adultery is a grave sin and the perpetrators of such a heinous sin should repent to Allah Ta’aala abundantly and seek His forgiveness.[1]
And Allah Ta’āla Knows Best
Saanwalibn Muhammad,
Student DarulIftaa
UK
Checked and Concurred by,
Abdul Azīm bin AbdurRahman,
Ismail Desai.
[1]وَفِي الْخُلَاصَةِ: وَطِئَ أُخْتَ امْرَأَتِهِ لَا تَحْرُمُ عَلَيْهِ امْرَأَتُهُ
(رد المحتار على الدر المختار، ج3، ص34، دار الفكر)
كَمَا لَوْ وَطِئَ أُخْتَ امْرَأَتِهِ بِشُبْهَةٍ حَيْثُ تَحْرُمُ امْرَأَتُهُ مَا لَمْ تَنْقَضِ عِدَّةُ ذَاتِ الشُّبْهَةِ.
(البحر الرائق، ج3، ص103، دار الكتاب الإسلامي)