Aslam

Praise be to Allah.The husband of a woman’s

daughter is one of the mahrams through marriage, so it is permissible for

him to see of her what he is permitted to see of his mother, sister,

daughter and all other mahrams. For a woman to cover her face, hair,

forearms etc. in front of her daughter’s husband is a kind of extremism in

hijaab. Refusing to shake hands with him when meeting is also a kind of

extremism. That may lead to problems or a breakdown in relations. She should

avoid being extreme in this manner unless she has some reason to doubt him

or she feels that the way he looks at her is not proper, in which case she

is doing the right thing.