Is it permissible for a mother to dispose of the social security funds disbursed to her disabled child—who sometimes regains consciousness—knowing that she gives him what he needs and disposes of the remainder, while she herself is in need of it?

What is disbursed to the disabled person as a grant from the state is his property. If his mother is his guardian, she manages his money for his benefit. If the mother is poor, her maintenance is incumbent upon her children according to what is customary, and this disabled person is among them if his money exceeds his needs.