I find it odd how everything I expected her NOT to say..thinking after ALL this time she'd know better, she said. I truly believe she trusted Robyn because of her desperate need for acceptance and to have a friend. I'm willing to bet KC flushed her letters FROM Robyn, and expected Robyn had done the same.
IMO, Casey lives only in the moment, says what she needs FOR THAT MOMENT, pretends to be whatever works FOR THAT MOMENT.
Her tragic flaw is that she never looks ahead and sees what might be the consequence, how these words or actions might play out...what might be the future outcomes of actions undertaken today.
If Casey believes this person she wants to get close to that minute... would sympathize with a molestation "victim"...she says her brother molested her and, and, and...(for good measure) "maybe too my Dad!" It never dawns on her that her Brother and parents are about the last people on earth (except her legal team) arguing she's "credible." Never considers this might, in the long term, be a very dumb move.
If she thinks this person she wants to get close to that minute...would "enjoy" racist comments, she writes them down. She never looks down the road and says.."Oh gee, maybe if I face a jury one day. racist comments might not be a good idea coming from me." Casey is totally focused on The Now.
Those letters show Casey is an impulsive, live-in-the moment suck-up to whomever is her current object of attention or affection. She is reckless about consequences of her actions.
I think a jury could come to understand from those letters how an impulsive child-woman would chloroform her baby on a whim to go out clubbing.
I think a jury could come to understand from those letters how an impulsive child-woman could stick her baby in a trunk for hours as she partied.
I think a jury could come to understand from those letters how an impulsive child-woman...might do ANYTHING to please the newest man in her life....to whom her Baby Girl is an unwanted, unneeded complication.