An overprotective mother dotes excessively on her teenage son. One day, trying to encourage her son who is diligent in his studies and club activities, she enters the bath with him for the first time in a long while. The son, seeing his mother's huge breasts, becomes highly excited and gets an erection! The mother, aroused by her son's adult penis, engages in incestuous sex out of love. Abandoning her modesty, she shakes her large breasts and repeatedly begs her son to ejaculate inside her.
