Three people who live together with the couple and their wife's younger brother. The wife had a physical relationship with her husband as well as her husband's official approval and younger brother. Adhering to the unusual daily life of having sex with a married couple at night and having sex with siblings after the husband goes to work. Three people who know that they have sex separately but never see it by implicit rules. When I get the consent of each and show off the sex of siblings in front of my husband ...