I agree with Jessica.
However, one thing concerns me. Judging by your post you are housing these two together. First off, this is highly frowned upon because it causes unnecessary stress and snakes are not social animals. Even more so because there was no quarantine whatsoever. This is just asking for trouble. This could also contribute to her recent aggression.
I would also up her feeding schedule to weekly. She is fairly thin (not emaciated, just thin).