Merlin paused and watched Arthur just restrain himself from laughing at him. Merlin's blush had spread from his cheeks to his ears, most of his face a bright red already, waiting for some smart ass remark.
"I'm fine." Merlin insisted, barely getting the words out before yawning. "I'll go get some sleep. Good night, Arthur."
Grinning to himself, Merlin headed out of the bathroom, glad that they'd set things right between them. Now he could really get some rest.