The typical work around for incest is instead of saying "Mom" it is "Landlady", and they use similar words for different familiar positions (Tennent, Neighbor, Landlord), so a patch is easier to make where as all you have to do is change those. These games also already have renders done for their acts and engagement.Are you saying he somehow hardcoded the dialogue so it's tied to the renders themselves, instead of independently in the dialogue window? Wtf. That's weird.
With WVM, you'd have to make new renders and fill the gaps in the story to make it work, there are times where it might get a little heated with Azel or Cedar, but nothing happens. It'd have to be made and added into the game.