I wasn't talking about the kid questioning her own paternity, but seeing tensions/complications arise from the fact that Julia had Cornell's daughter. Her appearance alone a living reminder every day that she is not Patrick's biological daughter. It takes a toll on a person, no matter if you adopt her as your own.
But since the dev decided it's a "no biggie", the story of PE2 is basically just more of Julia's shenanigans. In which case, I don't really see the point of this game at all - could've just as easily replaced all the characters with new, original ones.