0
Because her sister, Courtney, ruined her life. Courtney pretended to be Ali so who the girls thought was Ali the whole time they were friends was really Courtney. Because they were twins their parents thought Ali was Courtney and sent Ali to the mental hospital instead of Courtney. Ali escaped and killed her sister for revenge.
What else can I help you with?
Why did Ali kill her twin sister on Pretty Little Liars?
She was pretending to be Ali
Why did Ali want to kill the Pretty Little Liars in Pretty Little Liars?
Ali wanted revenge after her sister took over her life and she believed the pretty little liars helped her do so....she wants revenge.
Did Ian help kill Courtney in Pretty Little Liars?
No, her twin sister Ali did.
Why would Alison kill her friends in Pretty Little Liars?
Allison didn't kill her friends in Pretty Little Liars
Why did Ali want to kill Melissa in Pretty Little Liars?
shes married to the guy her sister was last dating
Why is Alison A in Pretty Little Liars?
Because the Pretty Little Liars weren't actually her friends. Courtney, (Alison's twin sister) made friends with them. Alison had nothing to do with them. So she's mad and tries to kill them.
Did the pretty little liars kill alison?
No.
Did Ian kill in Pretty Little Liars?
no
Why Alison becomes 'A' and why she starts to kill people in Pretty Little Liars?
Because she has mental issues and it's her sister who is normal not her
Did Ali kill all the Pretty Little Liars?
None of the pretty little liars die. I've read the books, Ali doesn't kill anyone.
Did Ian kill Ali in Pretty Little Liars?
no
Why did Wilden and Jason want to kill Ali in the Pretty Little Liars book series?
They didnt but A wanted the pretty little liars to think it was them.
