A mother, Fumiko, is having a hard time dealing with her son Yosuke, who is becoming more and more cocky. One day, she accidentally sees Yosuke's strong penis and can't take her eyes off it. "I wonder who he looks like... it's so much bigger than my father's." Fumiko, who has not had sex in a while, is unable to control her body and can't help but bite down on his strong penis...