Following this series is so difficult because of how inconsistent mao mao's intelligence is. She can go one moment from being a super genius that solves some obscure in the shadows conspiracy with some advanced knowledge most people in the modern age don't even know to taunting and insulting the obviously sociopathic lunatic that could behead her at any moment if she felt like it. I get she did it for the kid, I really do, but showing an act of kindness at the risk of her own life just does not sound like something she would do.