Sometimes I feel like it's *not* about a kink and that's the problem. Because I like incest pairings in fandoms where there's a lot of Gothic trappings in the pairing--or even if I don't like the pairing I can see how it comes out of the show.
What I find creepy are are incest fics about more healthy families--those are the ones I've read where it seemed like they didn't even remember where they were related and I got the feeling the author just wanted to pair those two characters and didn't have a thing for incest. If it's part of the kink it should...you know...read as a kink!