Fat Sick or Pregnant Dalmatian Molly?

[AJRipley]

We have a Dalmatian molly that has just now started to sit on our castle completely motionless besides her gills. Her boy toy (black molly) who is usually by her side constantly got "told" earlier today and kept his distance from then on. We've had them for almost two months and our parameters are frustrating but we test every day because the cycle is driving us nuts. Our Ammonia is currently 1.0, Ph is 6.4. At any rate, she looks big and boxy but she's kind of always looked like that. I figured maybe she was about to drop because she chased off Batman (Black Molly) and now is sitting by herself motionless on the castle. Anybody have any ideas? I tried to take pictures but not only is she somewhat camouflaged but she's also at an impossible angle to even attempt to see her belly.