If he marries a woman she becomes permanently forbidden in marriage to his father

Are First Husband’s Sons Mahram to Second Husband’s Daughters?

She breastfed a child thinking that it was her son; is the mahram relationship through breastfeeding established?

Ruling on marrying a fifth wife during the ‘iddah following divorce of the fourth wife

Is the mother of the father’s wife a mahram to his sons?

Most of his maternal cousins were breastfed by his mother and he was breastfed by his maternal aunt; what is the ruling on his brother?

Is the husband of her husband’s daughter a mahram for her?

Is the husband’s mother a mahram to the sons of his wife?

He was breastfed by the wife of his paternal uncle; are the daughters of his paternal uncle from his other wife forbidden to him for marriage?

Your father’s wife’s mother is not a mahram for you