Platy Preggers?

[petalpoppy]

you cant see it in these pics but for the time when i took the first pic and these ones today she has had a white bum only very small but still its there

 

[5teady_2012]

Guppies and platies cannot interbreed, no.

Steady are you sure? It looks to me like that fish's gut is dropped at the back too.

Yes im very sure

Look at the back end, its not dropped as much as the front, also going by the overhead view, she aint even that big, her belly aint even balled out yet.