The ruling on a wife's spending when she is strictly restricted from managing the household.
General Chapter
Al-Mughni
Book of Legal Interdiction
Primary text
If the wife is prevented from discretion in the husband's house, such as one who is provided food by obligation but is not allowed access to his food or discretion over any of his wealth, it is not permissible for her to give charity from his wealth because the underlying reason for discretionary spending is absent.