This is exactly what I thought watching it as it happened. It seemed as though she knew she had taken a risk, and it was the one solid (untruthful) deflection that she could bring and even get #BeKind points for protecting the identity of the witness.
And then suddenly the game was up and there was that flick of the switch, and that extraordinary breaking down, sobbing and being led out.
I was so glad NC was having none of it. NC isn't shouty anyway so it was just a continuation of hard truths presented in a dispassionate way.
I suspect that Kate Searle knows full well she has done wrong, and probably a great deal more than she admitted, but she probably believed she was doing wrong for the right reason, which in her mind made it OK. She is the last person on earth I would want as a doctor.