Yumi was having a good time with her son, although she was feeling lonely due to her husband's sudden assignment. One day, I saw my son's morning erection and found out that his cock was so huge that it could not be compared with her husband. Yumi, who has always had an eye for big cocks, has been obsessed with her son's cock since that day. Eventually I can not stand it ... I will finally take away my son's virginity. Even though I knew it was wrong, I became more and more captivated by the big dick.