I'd be willing to bet that the defibrillator, if that's what it was, functioned exactly as it was supposed to. An AED only advises the operator to administer a shock in a limited number of scenarios.
Yep. And if she wasn't 'fibbing', there was nothing to defib. I'd guess heart failure, and the reduced oxygen level brought on by altitude (most aircraft aren't pressurized at ground level) probably pushed her over the edge. Much more to be discovered here.