In the car ride back, Castle's grinning ear-to-ear again and humming to himself.
"Oh stop it. Don't you ever get tired of gloating?" She asks.
"You'd think so but no. I enjoy it way too much. So, now that I've had my fun for the day, I have to figure out what your secret is."
"Really? After all that, this is the most important thing to you?" Admonishes Kate.
"Yea, if you're embarrassed, I have to get to the bottom of it." With almost uncontrollable glee in his voice.
"Great, my luck." She almost sounds resigned to her fate. "Okay, I'll tell you."
"No you don't! You're not going to spoil my fun by telling! I've got to make this last, I'm in this partnership for the long run!" He says without realizing the significance of the statement.
"Really?" She pauses a long time glancing at him two or three times, trying to digest what he just said, then recovers with "What did I do to deserve this?"
"So many things Detective Beckett, so many many things." He laughs.
"Ooofh!" Beckett grunts furiously in frustration at his response, making him grin all the more.
