@Manwoaw whether shes a child or an adult, she is still the mc's child so seeing her in a romantic point of view could be considered incest, and even pedophilia
@chihuahuaaa she IS not his child, she is adult (age) and MC don’t really consider himself as their father but more like a father figure like we can see in Pragmata (or whatever the name of the game is), he protect them like you would surely do with a child you would help in an everyday situation