While this scene is fine, it's hardly one of the best made on the Hub. With scenes like Cooking Lesson Story, Lily's Thone, many of WeebU's scenes and so on that have so much more functionality and so much more going on, this scene just doesn't shine like them. Sorry to be practical, I just don't consider a little boob shaking and a smile to be on the same level.
It's a big challenge to do that quickly (though you get faster with experience), let alone achieving that with an automated expression plugin that can fit a wide range of looks!