I was stupid, I should figure out what happened to her much earlier, when she was looking at those pictures of herself in the computer, or when she was pretending fucking that guy on the table, or when she was kissing him in bed until he got a boner. There were so many hints, I was just too careless.
But this was all clear to me by the end of the movie fortunately.
Have u all just figured it out earlier or in the last minutes as well?