She had refused to believe it was possible.
Sure, she enjoyed posing to tease someone. That was all her. But staying like that – being frozen through hypnosis to stay like that – no. She had a mind of her own. No-one could make her do that.
Afterwards, despite the evidence of tired and sore muscles, she will still refuse to believe it is possible. I guess it’s had to believe something you’re not aware has happened … because your mind was completely switched off at the time …