Yes but Sora knew that they needed to be POLITE in PUBLIC! Riku.
"I know I am interrupting your evening right away," he said, and Roxas rolled his eyes. No he was interrupting ROXAS' evening by making Hayner go on a personal task. "I need to find Riku's brother. I had forgotten to tell him to be...discreet about my relationship with Riku."
"You forgot?" Roxas interrupted. "What exactly do you think he is going to say?"
The Prince gave Roxas a good whack and said quietly. "That Riku is a servant. Or even that he is common born. And that we are...in a relationship. Of sorts."
Roxas made a face at him. "How terrible to be sleeping with a common man."
The Prince hit him again, harder this time. "Would you STOP? The point is that I will be in trouble with my parents." So please help him.
Fine he was done being a brat to his cousin. "I will be at the table with the sweets," he told Hayner, and left him with Sora.