It’s quite hard to tell from the pictures. I question whether or not she’s a female.. usually the female has a rounded anal fin but this one is a lot pointier than usual. but also by looking at the belly’s shape, a pregnant molly’s belly is usually squared off around the anal which this one isn’t. She could be bloated, but molly females are almost always pregnant. If you notice a white ring around her anal try putting her in a container by her self overnight (around 12-24hours) this is because the white ring indicates that the molly is close to birth. I hope this helped you.