Yuriko, 42, is a widowed woman who lives with her son. She is still in her prime and full of sex appeal. She can't resist the young cock of her son's friend who came to visit, and she starts sucking it. Having gotten a taste for it, she makes a move on her son's friend, but her son finds her out. The mother, unconcerned, rides her son in the cowgirl position, and her son and friend both climax with her violent hip movements. The mother's desire can no longer be stopped.