As usual, it's painful because from the outside, that's all true, because nobody knows about A, which is often where the cracks and strains come in. On the other hand, ring of truth, because Aria's shitstorm of a life rarely involves A. And I don't mean that in the usual joking way, I mean everything that this lady is saying is kind of true even without A being in the picture. And that's the worst bit, because anybody else would just blow it off for that reason, but Aria can't, and doesn't.
Aria: Stomps off.
Diane: "Little dove! Have I hurt your feelings? MORE WINE!"
Aria: "You're being awful. You're doing shitty things and saying you're not."
Diane: "Have some delicious Chik-Fil-A, little muse."
Aria: Stomps more off.
Diane: "Look. I may not agree with the way Ezra lives his life, but I'm not gonna stand by and let you ruin him."
Aria: "Lady, I totally love him. It is my only thing."
Diane: "Oh yes, it's all romance and sacrifice, in your little Paris garret. Except have you noticed that it's you that determines what gets sacrificed? Never him?"
Aria: "I guess that's the price of being a child molester."
Diane: "Let's review. You got him fired from teaching at a public school, a thing I didn't think was possible, but one for which I thank you. Then you got him fired from Hollis College. I just want you to examine your motives."
Aria: "I don't have motives!"
Diane: "Everyone has motives, dear."
Aria: "Maybe in your cunty world, but not me. I just want to put feathers all over my body, hold hands with my lesbian man-child lover, and try vaguely to help my friends not get murdered. Stealing money I didn't know he had was never on that list."
Diane: "It's not too late for us to have a ... practical discussion."
Aria: "Are you seriously trying to buy me off?"
Diane: "Funny you should mention that, isn't it. That your diseased little mind would go there so quickly. Hmm."
Aria really does stomp this time, and it's amazing. She dumps her soda in a plant without even pausing for a drive-by glare and gets the fuck on up out of there. Good deal. Good girl, Montgomery. You win this week.
Ezra: "Fuck did you do?"
Diane: "Nothing! I had so much more awful shit to say to her and the little minx just walked away in the middle of things. Breeding tells, dear."