Merely raising a non-mahram boy does not make a woman a mahram to him

Your Eminence, what is the ruling on a woman who raised her husband's brother when he was young after his mother passed away, but she did not breastfeed him; she only raised him? He is now grown up and calls her "Mother." Does he become a mahram to her, and is it permissible for her to uncover herself in front of him, even though most people know that he is her son, and few know that he is her husband's brother? Please give us a ruling. May Allah reward you with good.

Answer: If a woman raises a boy who is not a mahram to her, such as her husband's brother or her cousin, or others, he does not become a mahram to her merely by being raised by her. It is obligatory for her to observe hijab from him once he reaches puberty, and it is not permissible for her to be alone with him, due to the generality of the scriptural evidence regarding this matter. And success is from Allah.