What must be done regarding a mother's request for her son to pay rent for an apartment designated for him, despite him spending on it and bearing the family's expenses, and is he obligated to pay both rent and maintenance together?

If the parents allowed their son to live in an apartment and he spent money on it with their permission, then they asked him for rent, the son has the right to claim the value of what he spent on the apartment, either to get it back or to have it deducted from the rent. If the parents are poor and the son is well-off, he must support them honorably. If the rent is not enough for them, the son must complete the support. Parents should be gentle with their son, and the son should strive to be dutiful to them. It is preferable to pay the apartment rent and not claim what was spent.