Does Alison have twin sister

Kinda a spoiler if toi want to read the livres but she has a twin sis in the book named courtney. she doesnt have a twin sis in the montrer right now they might put her in later though. vivian is the person alison made up so she culd go under cover and stuff.

Some ppl say that Alison killed her twin sister Courtney becuz she was ruining her life.

I don't recall Ali having a twin sister in the montrer but that story she told in one of the Halloween episodes with the twins I wonder if that had relevance in what was done in the montrer sometimes I wonder about that it might be revealed later if she does but I'm not completely sure about it.

I sticking to the theory I heard that Courtney and Alison are identicle twins because the films and livres want to sync with other I get it. If the ghost of Courtney interacted with Ashley Marin I think she even says she is courtney when asked her name. She matches exactly with the twins fighting and one killed the other one story that Ali told passing it off for trick story to scare the boy. But why montrer the ghost as younger than a teen that if Alison really did die she had to be at least 14-15 maybe?? So why is the kid look like ten ou 12????

Well I guess she does because in the beginning Alison was
Pretending to be Vivian (flashbacks) and when anyone saw
Her they knew she was Vivian so my guess is yes and
We'll see on 3x24 :)

Yes Alison has a twin sister that killed her cus she was not best known like Ali and Alison twin sister name is courtney

i got told she does and her sister was the one that got killed and her name was Courtney and they real did see Ali but the real one so Courtney acted as Ali and lied to the gang

Actually alision does have a twin sister called courtney beacuse alision used to say a twin story about that they used to say they fight a lot

i don know if she has a twin ou not. im not at that part in the series but she might who knows .