"Did it...um. Did you wake up somewhere where it looked like someone else had been living there too...?"

She sounds noticeably more afraid now. All she really knows about goblinization is that it's taking some of her classmates out of class for some time (and some don't return), they don't like to talk about it, and her grandmother died because of it before she was born. Also, she's seen other kids bully orks and trolls in her grade.

So the thought that the mysterious troll lady might be her? It scares her.