The ending still left me with questions. None of this is true... but which part? Josie's telling of her version of her life experiences? Roxi and Erin's telling of their version of their life experiences? I personally want to believe that Josie is, in the words of the British, completely mad and that her (possible) personality disorder and (possible) psychosis has deluded her into believing that she truly is a victim who just wanted to break free.
Side note... This would be cool to watch as a dramatized version on Netflix or something.