Honestly it ' s not really a mystery . She ' s a monster , she ' s a bully , she ' s a narcissist , etc . The cluster B stuff is probably dead on based on how the father described her treatment of the kids , of him , of the neighbors , etc . , and on how he described her mother ' s behavior after the murders . Don ' t assume the best about people you ' re dating or involved in . And don ' t settle for crazy just because you ' re desperate or idealistic . You can ' t fix crazy . I wish there were a button or a pill to fix it , but monsters do exist , and humanity recognized that fact a long time ago . Ancient texts are full of stories just like this . Every time we try to convince ourselves it ' s not true , we get burned fucking bad . This is just one more entry for The Gods of the Copybook Headings .