The following story is a spinoff from "The Book of David". This story assumes you know the primary characters from it, so background explanations on them will be brief, if at all. Familiarity with that story IS a requirement, although you needn't have read it recently. But if you haven't already read it at all, don't bother trying to read this one.
This story includes group sex, female bisexuality, anal, sibling incest (although not a focus), and toys. If any of that bothers you, find another story to read.
Disclaimer: While I come from a technical background, Chemistry is not my forte. If you find any errors, well, I told you so.