"Hey. Maybe I like mine motor oil, too."

Kate's smile doesn't dampen. A bite of antagonism aside, she's not worried about hurting his feelings -- secret menu or no secret menu. She is unabashed in her verdict, but expects it not to dig too deep under his skin. Maybe, had he been a stranger, she might have felt bad for the slight against the coffee shop.

But he's Billy. He knows she adores him.