so pretty much confirmed the dude is a lolicon, didnt make her a maid because she is too young to work and instead make her his "temporary wife" but still she does the housework, and since its not a work its for free.
I still think it's weird that she's too young to work but not too young to be a wife. Adoption makes way more sense. Oni logic, I guess. I keep reading oni-san as onii-san, though.