Is it permissible for my mother to ask her well-off son, who has become disobedient to his parents, to pay off the debt for his aunt’s gold, which she borrowed to build the house? And is it permissible for my father to disinherit him for not spending on them despite their need for money?

If a mother spends on the treatment of her child with the intention of being reimbursed, she has the right to demand what she spent, and he is obligated to pay it if she swears to that effect. The statement of the spender, affirmed by her oath, is accepted regarding whether she spent with the intention of reimbursement or did not intend it as a gift. The mother's debt takes precedence over the father's debt. It is not permissible to disinherit a child.