Mary has arrested Dean and Stewart for treason, as they were both caught breaking the most important rule in the Selection that was punishable by death:

You can only have a relationship with the princess.

Elowen was still nowhere to be seen, even though it has been a couple of days. Mary was running the kingdom while Elowen was gone, and everything was in chaos. The whole country is watching the execution. Main chain will be down in the comments.