[Ah... she hadn't even realized that her belt was still unbuckled, so when he wanders up and fixes it for her, her face lights up with colour again.]

Um... mm-hm.

[What is she getting all flustered for now!? After all that?]

I wasn't sure. I don't know a lot of dances, to be honest, but... maybe something with a few twirls and spins?