Talk:Pretty Little Liars (Book)/@comment-174.91.147.14-20120403001603

--spoiler alert-- : alison had a twin sister named courtney, while alison had the perfect life courtney was insane and was living in a mental intistution. then one day courtney comes to visit and switches places with alison. so basically courtney stole alisons perfect life and made it unperfect, then on the day on the sleepover that spencer was hosting the real alisoncame and wanted revenge on courtney for stealing alisons life so she killed coutney. but the other girls thought that it was alison that got killed since cortney and alison are twin sisters, so the real alison is still alive somewhere

hope this helps--A LOL