I use to believe that maybe she was an orphan and that everyone else her age sort've alienated her or didn't like her because she seemed to be so much better at everything (the magic, as seen in the season 6 premiere) and that Sunburst was the only one who gave her a chance and when he was sent away, she was literally alone and had no one. And then when he never kept in touch, she was scared he might've moved on and didn't want anything to do with her and was too afraid to go visit him and find out in case it was true. But it would've explained why she wasn't sent to the school herself when she finally got her mark. Because if she didn't have parents, she probably wouldn't of been.