An overprotective mother dotes on her teenage son to an excessive degree. One day, to encourage her son who is working hard at his studies and club activities, she takes a bath with him for the first time in a while. When her son sees her big tits, he gets so excited that he gets hard! The mother is turned on by her son's adult cock, and they engage in incestuous sex! She throws away her shyness, shakes her big tits, and begs her son to cum inside her again and again.