I remember reading a story on here a while ago, and can't for the life of me find it again.
General synopsis is that the son was away a college and didn't know what the rest of his family was up to. They'd try to keep him away so they could have their sex parties at the family house. He stumbled upon one when he came home unannounced.
Edited to include, not necessarily incest relationships, but the family would throw parties where there'd be lots of other couples/families attending.
Does this ring a bell for anyone?
