cordelia had been quite the sugarplum over the last month or so , but now that she had what she wanted ( and now that susan had come too far and promised too much to have a change of heart ) , she 'd reverted to the sour , supercilious , often suspicious woman susan had grown up with ; the one who 'd been driven into almost weekly bouts of rage by her phlegmatic , life-goes-as-'twill brother .