Is the mother's first husband a mahram (a relative one may not marry) to her daughters from the second husband?

Question:
He says: Honorable Shaykh, may Allah grant you success. A man married a woman, and after a period of time he divorced her, and they were not blessed with offspring. Yes, a man married a woman, and after a period of time he divorced her, and they were not blessed with offspring. She then married another man, and Allah blessed her with offspring. The question is: Does the first husband count as a mahram to the woman's daughters from the second husband? Without a doubt,

Answer:
he is a mahram, a mahram; because they are his stepdaughters. Allah the Exalted said: This is the category of those who are forbidden, and the reference here is that they are the daughters of wives or the children of wives. Yes. And Allah the Exalted knows best, and may Allah send prayers and peace upon our Prophet Muhammad and upon his family and companions.