While her husband was on a half-year overseas business trip, Ayumi lived with her daughter and son-in-law. However, she couldn't suppress her physical desires. Every day, thinking of her husband while masturbating, Ayumi once found out that her stepson Tetsuya had a big dick... Thinking 'as a substitute for my daughter who doesn't satisfy him,' she used her lascivious body to play with his thick meat rod. Unable to endure the lewd sight of his former race queen mother-in-law, Tetsuya finally exploded with pent-up sexual desire...
