"They are good children." Lol. They are clearly not. Maybe they have a good heartsomewhere deep in their cores, but they are not well behaved. It doesn't matter, if they don't know the 101 of diner courtesy or are becoming too loud, while haveing fun and forgetting about their surroundings. They are simply disrespectful and openly hostile to people they just met. They ain't good at all.
And then she is leaving that bunch in the care of...well some unknown magic student, who might as well be some homocidal maniac noble (You know, those who are quiet in the beginning.), who can get away with slaugthering one or two children (or at least hurting them badly) because of his standing. That caretaker is rather carefree.