How can someone who claims to be as jaded as Nakaba was in the first volume, actually wonder a stupid thing like "Who would have poisoned it . . .?"
Seriously, girl, you're royalty. And worse than that, you're royalty married into an enemy kingdom. And worse than that, people have a bias against you in both kindgoms because of your hair color. Ugh. Did you expect people to not try to assassinate you? Because in the first volume, you said multiple times that you expected to die.
How did you expect to die, if not through assassination? What were you even talking about?