"Technically, I only threatened you with poison. I'm not about to kill you," Karla corrected. "There are laws against murder in this world."

Not her own, though. Fear, Topher. Fear.

"But surely that stands as excellent testimony that I will do what I say. And I've said I won't tell either Wiggin so long as you don't give me a reason to do so. You can trust in that as much as you do that I can poison you if you give me just cause."

See? PERFECTLY REASONABLE.