The problem with games is that once you fucked them once the new is gone.
Repeated sex isnt interesting.
So less and less as time goes on.
I am more interested in breaking taboo's then then accauly sex.
Infrequently. I'm not a fan of incest in games, but I'm not an opponent of it. If it's there it's fine, if it's not there it's fine too. I don't patch for it, except when the story becomes idiotic without a patch (Straitened Times is an example). Honestly, I don't understand the popularity of this fetish, but if people like it, why not have it.