Sure, but admittedly not having exhausted the content of this update yet, it certainly seems like this is the 5th or so update in a row with zero content of that type.
What made this game fun for me was the complete absurdity, the "turned-up-to-11" nature of every aspect; he's banging his wife, he's banging his daughters, he's ruthlessly stabbing his enemies, his daughters are fucking his houseguests, he's fucking the temple guards, etcetc.
When nearly all of the above continues to be present in different variations update after update with a singular exception, I think it's more than reasonable for people to raise their eyebrows. Yes, story drives sex scenes, not vice versa, at the same time, the dev obviously has discretion each update on which part of the story to focus on.
Or perhaps another way to put it: Wouldn't it feel strange considering this world he had introduced - after several updates there were no sex scenes between the MC and his daughters? I hate incest as you know, and yet, that would feel very odd, because that's a part of the world he had previously built.