His brother had left him for a while, and he was starting to feel uncomfortable because the younger man had not returned to the palace hall.
He knew that his brother was a cunning person, and he was restless when his brother had not come back from summoning the princess of Shovalon.
His brain was working to come up with several theories as to what his brother could do to him, but then he widened his dark eyes when he realized something. "Wait. Reigen never verbally agreed to let me see the princess of Shovalon in the first place. What if he's planning something bad for me now? What if he's been lying about the princess all along?"
Crown Prince Randver just realized it, but Prince Reigen never said "yes" that he would take the princess of Shovalon to see him before leaving the great hall. Just being disrespectful as usual, Prince Reigen left the Crown Prince without saying anything.