Is it permissible for the husband to spend on his mother, but not on his wife and daughter, despite his financial ease and his wife's and daughter's travel and their need for sustenance?

The husband must provide for his wife and children in a reasonable manner, and the wife is not obliged to spend on herself or her household except voluntarily. What a woman earns from her work is her exclusive right, and it does not negate the husband's obligation to provide for her. The wife's maintenance takes precedence over others when there is a conflict, and it should be sufficient for food, housing, and clothing according to the circumstances of the couple. If the husband gives his mother from his money in a way that prevents him from fulfilling his obligatory maintenance for his wife and children, this is not permissible. However, if the husband provides for his wife and children in a reasonable manner, he may give his mother whatever he wishes. The wife should help her husband in showing kindness to his mother, and the husband should not neglect the rights of his wife and child under the pretext of honoring his mother.