The beginning was good, but this chapters idea and dialogue seems like it was made by a kid. When i was 6, i thought about this kind of story, which is cringey as fuck.
I have a theory on why the little sister did not appear at his first time reading, its because he didnt read it throughly and missed the character completely. And when she gave him the divided one, he noticed some things that he didnt notice before. Just like life, some things pass by to quick...