She's laughing as he twirls her...really laughing. It's girly and it's happy and it sounds free.

"What do you think?" she asks, holding up her hands and throwing them in the air, as if the question doesn't really matter to her that much. "Some kind of belated Christmas present? A reward for putting up with this place?"

Or a glitch. But everything else seems to be normal. Party doesn't seem any different, and why would something affect her and only her?