What did you think of Yuffie?

[Bubba]

Yeah, but she doesn't spend the night with him at the end of the game.

Just because we don't see it doesn't mean it didn't happen. Yuffie sleeping with Cloud and Barret sleeping with Red XIII are just parts of the story that just go "untold" That's the way i like to think of it.

I feel this can be better explored in the remake.