Is the wife more entitled to her husband's financial support than his parents, or vice versa?

The husband must spend on his wife and daughter. If the wife is wealthy and covers some of the expenses, there is no harm in that. Otherwise, she has the right to demand maintenance from him. If she is able to take what suffices her and her daughter from his money without his knowledge, she may do so. If he is unable (to provide), she may take the matter to court. As for what the husband gives to his father, it is permissible and considered an act of righteousness, and there is no harm in it as long as it does not deprive the wife of her rights. His dutifulness to his parents does not constitute an insult to the wife.