There is NOTHING you can do to figure out what her gut is telling her, or to prompt her to listen to it. Do NOT beg etc, that behavior will push her away. Continue the course you are on.
The one thing I've told you all along is that if she REALLY wanted a D, she would have already filed. She hasn't, as you said something is stopping her from moving forward. She has also had behaviors and made statements that lead me to think she's having a battle of wills like I've described to you already going on.
Stand your ground firmly and do not do anything to aid her in getting a divorce, continue to tell her you do not want one and that you are fighting to earn another chance with her. Continue taking NOP's advice, he knows what he's talking about...but avoid at all costs appearing needy, that will push her further away. I'm also thinking that it's a good thing to have HER explain to anyone who wants to know...why she wants a D, don't offer to have those conversations (like with your folks). It's very possible that in attempting to justify a divorce to someone else she may see...it's not what she really wants.