With regard to the way she should dress in front of them, it is
permissible for a Muslim woman to uncover in front of her mahrams and
womenfolk as much as is customary among people of religious commitment
and good manners, such as uncovering the head, neck, forearms and part
of the calf.
Whether the women and mahrams are Muslims or kaafirs, there is no
difference in the ruling.
But it is not permissible for a Muslim woman to wear short clothes in
front of them, or thin (see-though) clothes, or tight clothes that show
the shape of the 'awrah. The scholars of the Standing Committee said:
A woman should be modest, even if no one can see her except other women,
she should not uncover anything more than is customary or needs to be
uncovered, such as going out in the kind of clothes that she wears when
doing housework, showing the face, hands and feet and the like. That is
more concealing and farther removed from any doubt or suspicion.
Fataawa al-Lajnah al-Daa'imah, 17/288, 289
Dit heb ik net gekregen.. over het dragen van een hoofddoek dus..