Amelia considered it to be a win-win situation for holding a celebration. They could use it to show that the war was now over with and let her people interact with the northerners here. On the other side, Killian could meet the people who no doubt would hide the slaves in their possession.
"There must be a way for you to tell when someone is hiding something shady or is evil right?" Amelia asked as it made sense in her head for a skill a demon should have.
"Of course. That's how we pick out the best humans to control. What's in it for me to go around and see who is hiding something?"
Amelia was puzzled by this and said, "You would be able to find your people who are slaves."