One day, Reiko, who lives with her daughter and son-in-law, catches her stepson Hikaru masturbating due to sexual frustration. Unable to take her eyes off his enormously thick cock, Reiko... learns that the reason is because her daughter and son-in-law are sexless. "I'll do it in place of my daughter," she says, shamelessly playing with his meat rod and continuing to seduce him. Hikaru, who has been storing up sperm all this time, stands no chance against such advances from his stepmother... and easily succumbs. Since then, the two have been secretly indulging in pleasure while evading the family's eyes...
