She looks gravid to me.
I know we've seen photos here recently that look like gutworm infested mollies, but it isn't that common. A few gutworms, yes. Farmed fish have them, and wild caught mollies as well, though wild caughts are hardly ever seen in aquariums.
I got a bag of nematode/Camallanus infested Limia from a breeder once, and they swelled up like recent photos here. That was nasty.
But treatments of non Camallanus infested fish in bare tanks with wilds might leave one or two small expelled worms out, and with farmed half a dozen tiny white worms. That's not enough to make the fish look gravid.
