I'm not an expert in the psychology of an abuser, but I watch a lot of ID Channel: Dorinda seems to have exhibited behaviors common to abusers.
Ramona said she had Dorinda over for drinks, Doris got nasty and said "some very hurtful things" ; the next day, Doris apologized, and had made her a playlist (mix-tape?). And after treating her horribly at the Halloween party, sent an apologetic text the next day to the effect of "I don't like fighting, let's move on".
Isn't that what abusers do? Show alleged remorse after the fact, and offer gifts or something to make amends for their behavior, which, by the way, wasn't their fault: it was because of something someone else said/did that MADE her.