Despite the calmness that she was projecting externally. Internally, Madam Mo was freaking out. Zachariah's worry was with somebody linking them to the crime. He seemed to be genuinely scared of being caught.
Zachariah's ear to see panic was a good thing. It showed that he still had a lot of self preservation.
But he was missing the bigger picture. The police catching them would be the kinder option if things were to go wrong. She had watched the videos of Tristan Asher fighting off the killer that Madam Mo had sent.
Had she known of that side of Tristan Asher beforehand, Madam Mo would not have gone after his wife. the man who had been fighting, in that video had barely been a man at all, that had been a beast, something that fed on blood and fire.
