Ali admits that Mona got the best of her, before she faked her death. When Mona was in Radley she went to her, to recruit her for her lackey, and took over the A-Team. I think she was at Radley and faked her own cure like Mona in order to get out, years before she became Queen Bee. Even before she faked her death she was mean and manipulative and cruel. In "death" under the mask of A she takes it to the extreme.