Mandarin? Well, that is surprising. It makes sense, though. River's speech has occasionally been peppered with words that he doesn't know. He'd never been sure what language they were - some future space dialect, he'd guessed. Apparently not.

He sticks his tongue out at her, in turn, then laughs. This is another thing that River is good at, bringing out his childish side. Ned hadn't gotten much of an opportunity to be a child. Not after his mother died. He likes that River can be silly, that her silliness coaxes his own immature joy out of him at moments like this.

"I'm lucky to know you two, too."