Golden Muppy? (if you hate hybrids, don't post here)

The only issue i see with the green molly theory is that Muppy has a larger stomach then a normal molly, more guppylike then mollylike. See the pics i gathered, it shows a female guppy, a molly, and my Muppy. Looks like Muppy is a cross between the two, from the stomach to tail ratio(big words, ah!) It all depends on how old a molly has to be before they can mate. The male died about 3 weeks ago, so Muppy would have been about a month old by then, but still smaller then the other 2 adult females in the tank. So, anyone know how old a muppy has to be before it can breed?
the picture i attached was of a males.
here's a picture of a pregnant female molly.

Livebe80.jpg
 
thanks :)

well, the 'muppy' wasn't pregnant. Might me now though, I put my males in a large net in the tank and they got out (doing some major reworking of their tank) so I may have a bunch of newly pregnant female mollies that I don't want pregnant :rant2: anyway, thanks for the pic, the 'muppy' appears to just be a green molly and not a hybrid after all...
 
it likes like a she because of the dark coloring on her tail is it a gravid spot or is it just coloration
 
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