Is the New Husband of One’s Foster Mother Maḥram?

Answered by Shaykh Yusuf Badat Question: I have a question regarding raḍā’ah (breastfeeding). Is the new husband of one’s foster mother a maḥram? Example: if ‘Ayeshā and Bilāl were married and have some biological children together. ‘Ayeshā also breastfed a baby girl called Zaynab. Later Bilāl dies, and ‘Ayesha marries Yūsuf. Will Yūsuf (the new…