Why would she be asking for a moment? Unless I'm mistunderstanding what you two mean by that... because she walks directly over to him. I think she's asking for 'one' dance, and then at the end, (SPOILER)'one' kiss. She only uses it twice in the game, doesnt she? It's not a constant thing she uses for Squall. She uses it when they first meet, and then at the end as sort of a joke... reminding him of the first time they meant and the dance they shared... and how their feelings for eachother have changed over that time.