For the moment (which probably won't last very long), Kate doesn't notice Billy on his little mini-patrol. She's still under the assumption that he and Teddy are off in a corner somewhere basically attached to each other at the hip and other body parts. If and when she finds out that they've been secretly judging her activities tonight, well, somebody won't be too pleased.

"Welcome back." She greets John with a genuine smile as she holds out her mug to clink with his glass. "They haven't started yet. They're probably trying to explain what a DVD is to Steve anyway. That'll take a while."