Ok, so why doesn't this have 'exhibitionism' as a tag? I mean, they may not be doing it in a public place, but they're filming it with the intention of showing it to others and getting off on it, and that's one of the key features of exhibitionism, right? Or does 'filming' imply that the characters 'grow aroused by the idea that others are watching them'? Or maybe I'm confused and it's actually 'the idea of someone catching them in the act'?
Just my thoughts. The chapter was excellent, by the way.