The only excitement Merlin got out of life these days were the moments of intense heat. When one had been alive as long as he had, getting burned reminded him that it was worth carrying on. Of course in those days, Morgan had been a beautiful and attentive student, until, that is, that she had learned all she could from him.
He must be careful not to teach Luna everything she could want from him. But oh, such searing and wonderful pain if she did fuck him over.
"Truer words never spoken," Merlin agreed, his fingers circling Luna's wrist. "But I hope you will be careful not to get burnt up completely, my dear."