Yumi, who is not having sex with her husband, decides to meet up in secret with a man she met at a drinking party, but her son-in-law, who had seen the whole thing, threatens and rapes her. The son-in-law is attracted to Yumi's big breasts and wants to have a relationship with her if he gets the chance... Yumi has her big breasts played with under the same roof so that her family doesn't find out, but she soon realizes that she is enjoying the situation...