It is not permissible for a woman to take anything from her
husband’s wealth without his permission, unless he is falling short in his
spending on her, in which case it is permissible for her to take what is
sufficient for her and her children on a reasonable basis, as the Prophet
(peace and blessings of Allaah be upon him) said to Hind bint ‘Utbah
when she complained to him that her husband Abu Sufyaan was falling short in
his spending on her and on her children. He said to her: “Take what is
sufficient for you and your children on a reasonable basis.” There is no
kafaarah required for that if the situation is as we have described. But if
she takes when there is no shortcoming on his part, then she has to return
what she took even if that is without his knowledge, if she is afraid that
telling him will make him angry with her.
May Allaah send blessings and peace upon our Prophet Muhammad
and his family and companions.