Dad Spy/Son Scout incest, where they both know, and it isn't violent bloody rape. I read a few before, which were fantastic, but in one, everything was consensual but only Spy knew the truth, and in the other they both knew, but Scout was raping Spy. And I think there was a third where they both knew and it wasn't rape but it was REALLY SHORT. So yeah, anything would be nice. It could be as bitter and/or angsty and/or "omg you're my son/dad and you slept with me??!?!? blurrhghg vomit" as you want, but no forced sex.