He digs her elbow into her soft underbelly, rolling his shoulder toward the assault. The bottle clinks again, borne on some psychic tether, and in the end both of them have glasses filled three-quarters full, prisms spilling over the backs of their palms. Castle sucks a rainbow of colour from between two of his knuckles and grins, his shoulders quaking with amusement.

"Come on, detective. I know you've got it in you."