Here's been my experience: I got some Mollies back in the beginning of May. I did notice one of them was fat like yours and in two weeks of having her, she had 12 fry. I never saw her square off. Perhaps she had them early out of stress. And, I have NEVER seen my molly without an appetite. I did notice that she may have been getting bigger again and possibly pregnant again (again, never got squared off). Just the other day, I noticed 2-3 really tiny fry when I was doing a large water change (out of stress again, maybe?). I have only seen one fry lately. Not sure how many she had or if any got eaten, but she has never acted any different. Almost like it wasn't her that had 'em. But it had to be her since all the fry look just like her! Sorry so long winded.