And so it starts... I hate ntr like any sane person, but starting with the comments "ntr, yes" or "ntr, no" in a game that is in version 0.1 and that doesn't mention anything other than the mother has a boyfriend, something that can practically become netori or that, for the story, will serve to indicate that the "boyfriend" was the one who killed the father in the end.
FOR NOW the most sensible thing is to just wait and see, if the situation starts to be "Eric" type the ideal is to jump ship, but that will only happen until the "boyfriend" and the mother show up... if they do (maybe It's a nephew/aunt type game).