Nova's water inflation~ An inflation story

Roxy the Vaporeon and her friend, Nova the shiny umbreon were very bored. Roxy was completely out of ideas, and so is Nova. Suddenly, Roxy comes up with an awesome idea. They have never came up with an idea like this. In fact, Nova had no idea what idea Roxy has. Roxy wants her inflate her friend's belly with water until it popped. At first, Nova doesn't agree, but Roxy eventually pressures her enough to accept the challenge. So they decide to do it, and what will happen next? Fund out in this story...