Is it permissible for a wife to give charity from her husband's money that he allocates for her and their household, without his knowledge each time, even though he previously gave her permission to dispose of it, but she sometimes notices his disapproval?

If a husband permits his wife to give charity from his wealth, it is permissible for her to do so without his permission each time, provided that there is no extravagance or squandering, and that the spending is generally from what people would willingly give, and that it does not harm his household.