A few things:
Sorry I didn't include a button for "all of the above" ... LOL ....
I can't believe she will take the stand either ... Jose Baez would be a fool to allow that, but stranger things have happened.
Out of the choices, I think it's most likely that she would turn on Cindy or George, and here's why:
According to her patterns that we've seen (Jesse Grund, Cindy Anthony), every time someone catches her in a lie (paternity, stealing money), she turns on them and finds a way to punish them. With Jesse, when he requested a paternity test she freaked out on him. With Cindy, when she confronted her about the money, she left and took Caylee with her, never to return. If you remember the jail calls with Cindy, she belittled Cindy and started yelling at her. Personally, even though Cindy and George support her now, I think as evidence comes out that they can't refute, they may eventually begin to start looking more critically at her when they realize she's going to jail anyway and want Caylee back.
The minute they stop believing in Casey, she will probably find a way to implicate or blame them. Cindy and George were smart to go with Nejame in my opinion, because I'm sure they're aware of everyone Casey has doublecrossed; why would they be any different? Cindy even says on her myspace blog that Casey has lied and betrayed her many times before.
I think this is going to get even uglier as we get closer to the Nov 17 trial date!