The son, who had a strong and lustful interest in the soft, ripe, huge ass and enormous breasts of his beautiful fifty-something mother, Reiko, one day witnessed her masturbating with an obscene toy, thrusting out her big ass. The son, who had a glimpse of his mother's womanhood, exploded with desire, kneading her big breasts and devouring her big ass, soaked with her juices. Even though he knew that it was a forbidden act with his son, the fifty-something mother felt intense pleasure, wanting even more intense pleasure, and shook her big ass and gave her voluptuous body to him!