Is it permissible for her sister’s husband to stay overnight with them in their house?

A woman’s maternal uncle is a mahram and it is permissible for him to be alone with her

The daughter of a sister through breastfeeding is forbidden in marriage

Her brother was breastfed by the wife of her maternal uncle; are her uncle’s children mahrams for her?

Is it permissible for the husband’s brother to take his brother’s wife to the doctor?

Is the wife of one’s son through breastfeeding a mahram?

Uncles of one’s parents are mahrams

The husband’s children are mahrams for their father’s wife

Is the father of one’s ex-husband a mahram?

The wife of your wife’s father is not a mahram for you