Talk:A is for Answers/@comment-23.122.126.71-20140315222555/@comment-98.112.159.220-20140316005027

Hey! Great question! I went back and re-watched a few episodes to see if I could figure it out and I got it! She was mean to the liars because Alison asked her to be mean to them. Remember in 4x18 when Emily overhears Shana on the phone with Ali and Shana says "Ali, idk if I can keep being mean to them. I especially feel bad about being so mean to Emily because she's a really nice person. Plus Jenna is starting to get suspicious and I don't want to lose her. I'm sorry, Ali, but I love her and I can't play this game anymore." So it seems that Ali is just playing with the girls. Another possible explanation is that Ian's evil ghost has possessed Shana's body and is forcing her to be mean to the girls in an attempt to drive them insane. A third possible explanation is that you've asked this very same question multiple times and it's been answered multiple times by multiple people and you should stop asking the same thing over and over.