That woman sounds like all talk.
Suwon for sure can see the worth and credibility of a person. I mean, he plotted his kingship and everything, he himself isn't a simple-minded, easily manipulated person.
And that woman thought she could have him twisted around her finger when they've only just met. Not to mention she was bold enough to proclaim that she possess the kinds of 'secrets' that can ruin Kai.
She's not that dangerous as she thinks she is. She looks and sounds like an impatient lunatic, eaten up and tortured by the Crimson sickness, so much so that she can't stay sane any longer.
So the father king conquers, and the son king nurtures huh..