It doesn't get much more awkward than this. In a clip from "To Kill a Mocking Girl," Aria and her father run into the latter's former mistress. She seems to still have feelings for Mr. Montgomery, doesn't she?
Alison: It's like you went to sleep one night and forgot who I am. Aria: I know exactly who you are. A. Alison: Stop saying that. Aria: Why should I? You're A! You stole the game from Mona and then you killed her because she had proof.