Not to be rude, but this is irrelevant.
Braindrip will add incest when he takes it to Steam as Steam does not bar that. He could easily add it as an update, and who knows what animations and renders he has that he has not shown.
Read his last post here. He is taking money KNOWING he is not doing shit, because "it's not gonna last forever, so I have to make what I can" Family etc etc etc etc.
There is no sacred oath to NEVER HAVE INCEST, I AM NOT INTERESTED IN THAT, is all bullshit. He doesn't have to be into it. The dudes paying $19.99 for the base game and $11.01 for the incest DLC are what will drive that, so please, off the high horse. His interest currently is in stealing money from his supporters for as long as he can. He SAID that.
Peace