Nicky's first conversation with Katriel doesn't seem very realistic. So, Sister Justina has control over her students on the weekends, even though they live with their parents? That doesn't seem right.

Nice start. It's interesting that Faith accepted teh woman's word over the word that teh house wasn't a scam- if it was a scam, they wouldn't admit to it, would they? Anyway, interesting first chapter, you've caught my attention!