It's funny how things happen in "epidemics" here! For a while it seemed like there were so many fish with spots.. then with ich.. then kh problems.. Well now, we have gender blenders!! Male fish are female, and female fish are male!
I know - I know... I'll be next. I snapped a photo of my girl Dot, and it looks like breeding stars on her anal fin.

But I've read here that some confirmed females have them on some fins, too - so I guess time will tell!
Good luck with Mrs Muggles!!

I've never had eggs, so I can't help you on water change advice. But hopefully Mr Miagui won't drop eggs soon, too!
Debbie