The children of your husband, both those from before you and those from after you, are mahram (relatives one may not marry) to you
Machine translationRead the Arabic original
Question: A woman asks: I married a man who had children from another woman. Then he divorced her and married another woman, who bore him a son. He divorced her and left the boy with her, so she raised him, but did not breastfeed him. She asks whether all of them are mahram (relatives one may not marry) to her?
Answer: All the children of your husband, whether from before you or after you, are considered mahram (relatives one may not marry) to you, and you are not required to observe hijab (the covering prescribed for women) in their presence. This is based on the saying of Allah (Exalted and Majestic is He) in Surat al-Nur:[An-Nur 24:31] The verse [al-Nur:31] – and al-bu'ul: they are the husbands – Allah (Glorified and Exalted is He) clarified in this verse that the fathers of husbands and the sons of husbands are all mahram (relatives one may not marry) to a woman.
Answer: All the children of your husband, whether from before you or after you, are considered mahram (relatives one may not marry) to you, and you are not required to observe hijab (the covering prescribed for women) in their presence. This is based on the saying of Allah (Exalted and Majestic is He) in Surat al-Nur:
not expose their adornment except that which [necessarily] appears thereof and to wrap [a portion of] their headcovers over their chests and not expose their adornment except to their husbands, their fathers, their husbands' fathers, their sons, their husbands' sons
وَلا يُبْدِينَ زِينَتَهُنَّ إِلَّا مَا ظَهَرَ مِنْهَا وَلْيَضْرِبْنَ بِخُمُرِهِنَّ عَلَى جُيُوبِهِنَّ وَلا يُبْدِينَ زِينَتَهُنَّ إِلَّا لِبُعُولَتِهِنَّ أَوْ آبَائِهِنَّ أَوْ آبَاءِ بُعُولَتِهِنَّ أَوْ أَبْنَائِهِنَّ أَوْ أَبْنَاءِ بُعُولَتِهِنَّ
Source
binbaz.org.sa
The Arabic text is copied verbatim from the original source, without any edits.