She does not have to give the money to her husband. Her money is hers, unless she willingly gives up something to her husband or her brother or to someone else. She does not have to register her car in her husband’s name unless she has given it to him willingly. On this basis it is not permissible for her husband to mistreat her in order to make her give up some of her wealth. He is obliged to spend on her from his wealth, not from her wealth, and to find her safe and suitable housing, just like any other husband. The same applies to his children. If he spends on them seeking thereby reward from Allaah, he will get that, if Allaah wills, even though that is regarded as his duty.