This is creepy in an enjoyable sort of way.
Personally, I'm already looking forward to the revenge these girls will take when they finally figure out what's going on.
Meanwhile, one of the things that makes it extra creepy is that much of the instruction that they're being given would have been commonplace in 1950's finishing schools.
It's painful watching these people fail themselves. The quotes from their older selves are depressingly accurate:
'Drinking, drugging, sleeping around, it's all the same thing. You have these lines you won't cross but then you cross them and suddenly you possess the vary dangerous information that you can break the rule and the world won't instantly come to an end. You've taken a big black bold line and you've made it a little bit grey. Now, every time you cross it again it just gets greyer and greyer until one day you look around and you think, "there was a line here once, I think."'
This is a lovely piece of writing about a small group of people and what they know and are able to feel and say about themselves and each other. It's clean, calm, character-driven prose that gets you inside the head of each of the main characters.
We see the world through their eyes, amplified by the different things each of them gets from reading Austen and the different things they see in Austen's characters.
There's a lot of grief and pain and awkwardness but there is also a backdrop of hope.