I knew of one couple who had a spare room off the side, next to the garage. They wife would "entertain" her guests in there while the husband babysat the kids. Went on for years without incident.
With another couple, the wife and her BBC bull would spend the rest of the evening in the bedroom upstairs while hubby and the kid would "camp out" in in living room on weekends. The cuck would have breakfast waiting for all if them the next morning.