I wrote this a few days ago and only just remembered that /vp/ has a fanfiction thread. It's an incestuous, femdom thing between Lusamine and Lillie. There's not explicit sex, but a really heavy foot fetish emphasis, so it's still NSFW by any sensible standard. I still haven't proofread it cause I'm a lazy fuck, so I wouldn't be surprised if it has errors.
http://archiveofourown.org/works/9212867 