"Why would I want teeth like that?" It seems terribly awkward. But there's a more important question there. "Oh! Um, the point of the game is to hit the targets with water to win a prize, and the more you soak them, the better your prize is supposed to be." Therefore, it makes perfect sense that Lapis felt the need to soak everything.

... From the way Greg is looking at her, Lapis has a feeling that she may have over done it. Just a little bit.