My opinion I would get a bigger tank, like a 5 -10gallon. That way she isnt stressed out in a 1 gallon, Id think thats toooo small. and if she has her babies in the new tank they need room as well because she can can have MANY. like 10-30 I was told.
We just set up a 10 gallon last nigjt because a few of our platies are expecting so we can put them in the new tank until they have their babies then can go back into their 29 g tank.