Pregnant mixed platy? (its name is cheese)

K

One of my mixed platys (I have two) seems to have a larger stomach than normal. Based on what you can see, does Cheese look pregnant? If she indeed is, what should I do? Any help would be appreciated.

Additional info: tank is about 10 gallons and has 2 mixed platys, a rosy-barb, and an aquatic dwarf frog in it. I clean the tank regularly and change 10-20% of the water biweekly.

Cheese:

(Platys are live-bearing fish)