I thought it may have been one of the other students, actually. I don't think the daughter are the only ones in the school.

...Though I guess that doesn't discount the possibility that someone she used to bully tried to frame her, in that case. it just probably wouldn't have been one of the daughters and maybe begs the question of wow, someone sure tried to screw one girl over.

[ Is he just getting really into speculation? Yes, probably. ]