she then says as she's now all big, round, sloshy and full of water

Water... Aqua... H20... Oxidane... Dihydrogen monoxide... Whatever you wanna call it, this miracle brings comfort and relaxation if you wanna be big and sloshy... HIC! I may be a giant water balloon, but regardless of my appearance, I'm still thirsty. A girl's gotta stay hydrated y'know! HHNNNGH! A tsunami warning has been issued, and it's localised entirely inside my body! I love water!