She looks eggbound more than bloated - I would fast her for a few days and use a tiny amount of epsom salt to reduce swelling. Sometimes females can get overly large just by having too many eggs in their bellies it can look uncomfortable. They will either reabsorb the eggs or expell and eat them.
My girl Clara is a little eggy too, so I can relate! I love your gal's grumpy face, :)