The other thing I’ve found is that sometimes things have to fail before people will make a change – e.g in you situation don’t pick up after this co-worker. Let the bosses see what she doesn’t do and let it all “”fail”. You are not paid double to do your work and hers. Do your part meticulously and let her part fall the pieces and just keep working.
Its doesn’t feel good doing it but maybe the bosses cant see how you are holding it all together and the toll it is taking. If they don’t see the problem or experience it then they wont do anything to change it.