The father's wife is not a mahram to the daughter's husband from another marriage

Question: My father married a second woman and has a son from her. Is it permissible for her to be a mahram to my husband and to uncover herself in front of him, given that my father is my husband's maternal uncle and she is his uncle's wife? Please give us a ruling. May Allah reward you with good.

Answer: The father's wife is not a mahram to his daughter's husband from another marriage; rather, the status of mahram applies to the wife's mother in relation to her daughter's husband. This is based on the statement of Allah (Glorified and Exalted is He) in specifying the women who are prohibited: [Surat al-Nisa: 23]. The father's wife is not the mother of his daughter from another marriage. This applies equally to a mother by blood and a mother by breastfeeding, based on the statement of the Prophet (peace and blessings be upon him): It is agreed upon that it is authentic. And success is from Allah.