[mcansky]

I would second that last few lines : reach out to some other CEOs or C level you know, check with them what they think and if they would be open to have a chat or two with your CEO. Also if you have been there for a while then you possibly have a good chance to be able to reach the CEO and talk openly. Go for a walk, coffee with her and ask how things are going for her. Stay away from work topic possibly at first but do say that you are worried about her and a possible burnout. Offer to help and to put her in contact with some other CEOs you know. It's important to get communication going again before you can regroup and build something.

It could also speed up the dissolution process though. You might get fired on the spot also but if things go as you describe there is probably tough times ahead.

Walking out is the easiest (work wise) option, not easy either (personally wise). Keep in mind that, in a way, "it's just a job" so don't let it eat you either. It doesn't cost much to keep some lines open and stay in contact with different companies and leaders...