Talk:Who's In The Box?/@comment-67.180.234.251-20131105034625/@comment-24004040-20131105151957

She doesn't find out a huge secret about Alison, Alison knows about a deep dark secret about Spencer, therefore she is afraid if she comes back. That's how I understood it.

I doubt she has driven her to disappear, because then Alison wouldn't have showed herself to the girls.