Serenity sat with her coffee. "It really does smell good, love."
Spencer thought for a moment. "I think I know. We were on a case, staking out an unsub. I was still recovering from the Hankel case and my addiction so I was paired with Aaron. There was one point while we were waiting for the unsub to move, where he'd started quietly singing a song in another language while looking at the moon. I remember making a mental note that the language was familiar and I would look it up later. But with my memories back, I realize it was Lunarian that he was singing in. And there was only one song he ever really bothered to purposely learn in Lunarian. His and Sere's song. He'd sing it to her in Lunarian when she was stressed or worried to help her relax."