Coincidence.

Aris couldn't hear Rasmus's conversation with Kiel because Kiel used magic to prevent everyone from listening to their discussion back then. Rasmus told her everything and he seemed a bit unsure about the deal he made because Kiel wasn't someone he had dealt with before.

"You gain nothing pretty much, don't you?" Aris asked as she got up on her horse. "How are you going to deal with this? You're not even close with Thalior and if you suddenly approached him, he would have suspicion."

"He will approach me, I'm pretty sure of it," Rasmus answered and got up on his horse. "I know too much and he needs every information he can get because he's preparing for war."

"You mentioned your father's diary. Don't you think that will help you in this situation?" Aris asked, following Rasmus.