Yu was sincerely congratulating her happy daughter who had a boyfriend. So she often invited her boyfriend over and served her meals, and as her mother, warmly watched over the young couple. But she also felt lonely. She is not satisfied with her daughter who is becoming more feminine and her conjugal life which is decreasing. Yu forgets that her daughter and her boyfriend are in the next room and she indulges in masturbation. And she is so immersed in her pleasure that she provokes her daughter's boyfriend with daring fingerings, not realizing that her daughter's boyfriend is peeping at her in agitated manner.
