Is the brother obliged to pay the remaining ticket price to his mother, after the death of the father who had given him this amount?

If the brother paid the price of the tickets to a man to cut them without the father's permission, then his action is considered an تجاوز (transgression), and he is liable for the damage incurred by the principal. He must pay the remaining money to the heirs of the deceased, and he can seek reimbursement from the man for what he paid him, if he finds him.