I know but i didn't understand it.
ARIA..
if you guys remember, end of season one(when marlene tweeted "#BigA") In the school corridors Mona ran up to Aria asking her to wait up, Mona called her Big A.
"hey, big a, wait up." Aria rolled her eyes and nervously looked around to see if anyone heard.
knowing marlene, it will probably be someone so unexpected. like Aria's mom.. or Spencer's dad.
Aria!!
Wren or Jason.
Allison! Its all fun and games for her! Just like the first halloween episode where she tricked the girls!
Mike, Ezra, or Jason(?)
alright mine theorie:
none off the girls because why are they doing that to therselfs and none of the parents because they never new about anything. Maybe jason or wren because everytime something happend like with emily when she trained but when she used something there became a hole in her stumic. there was something in the tube and only doctors or illigal people have that i think and wren works in a hospital? and jason never liked the girls maybe he kissed aria to be closer with the girls and would't be that suspected?