Is the fish still eating well?
What does its poop look like?
If the fish is eating well and doing normal coloured poop (not stringy white poop), then she is probably full of eggs and enjoys her food.
-------------------
On a side note, your water looks milky cloudy. That is usually caused by a filter that hasn't established yet, or by uneaten food rotting in the tank.
How long has the tank been set up?
How often do you do water changes and how much do you change?
Do you gravel clean the substrate when you do a water change?
Do you dechlorinate the new water before adding it to the aquarium?
What sort of filter is on the tank?
How often and how do you clean the filter?