Talk:Mona Vanderwaal/@comment-72.130.96.118-20120730202247/@comment-74.162.159.45-20120809184519

Actually, it does. In unmAsked Spencer and Mona go to A's lair and Spencer finds Ali's diary. Mona got the diary around the first episode, whenever Emily met Maya she saw a box of Ali's things sitting a the curb. Mona could've easily rooted through it and found her diary that exposes all of the girls secrets.