well, not much you can do about it now!! its good you negg'ed her back...wait a few weeks, and then send a mutual withdrawal request form, by then, the both of you's would have gotten over any emotions, and maybe she'll realize she doesn't want a negetive sitting on her score like that (at 90%)!!
anyways, man is it ever irritating when newbies leave feedback like that WITHOUT CONTACTING YOU FIRST!!! personally, i think that's just rude! i would be steamed!!X-(
oh, and by the way, block her, and i'm blocking her!
Kat