It sounds like she is a master manipulator, Scooby. Remember, the first rule of business is CYA (Cover Your Arse). Well, it's my rule. So keep writing everything down, names, dates, etc.
She has already started her counter-attack on YOU, garnering sympathy and crying 'poor me' over her personal problems. I have dealt with this type of bully before. Make sure the higher bosses who trust you and know your people skills are well aware of this. In this way, they can watch over the situation. Sometimes you just have to wait things out, keep doing a good job, eventually her true colours will show if you keep the spotlight on her.
That's what happened to me. Twice. In one case, it took six months till the culprit got fired. The second time, I had to put up with it for 2 years, but I finally got a transfer to a different department and a promotion. The bosses (on both occasions, different companies) told me afterwards that they did not know the truth of the situation in the beginning, but in time they were able to determine who the real troublemaker was.
Just my two ... don't let it get you down.
tal