The Swingers's BBQ (29 of several): Drama.

Like a few minutes later, this slightly-older swinger-looking woman wandered by and stopped and was asking everyone, "Have you seen my friend [name removed]?", and then would say that she hadn't seen her for a while and was wondering where she went to because she had no idea, and she was very very ingenuous, and then someone finally was like, "I saw her a few minutes ago going into the backroom with [name removed]," and the woman was like, "Ooooooh!", and she said it in such a tone that you could imagine her smacking her head as she said it, like it never occurred to her that she and her friend would go to a swingers's party and her friend would slip away to fuck without her knowing it.