From below vent(cloaca) to down between legs?A weird thing I didn’t really notice with her was how pronounced her back end had become- I guess you would sort of say the area far below the cloaca. It looked like a fat pouch, it’s squishy.
Water belly, or ascites, can have several causes, infection and/or organ damage.
Can be hard to see even when large, almost have to feel for it, once you know it, it's easy to spot.
Best of cLuck!