I have a tank that started with 3 guppy fry and 3 molly fry. All 3 guppies were female and the mollies had 1 male and 2 females. One of the mollies gave birth and I now have 4 fry in a 10 gallon(sold the others.) Now it looks as 2 of my female guppies are pregnant. One has gotten considerably bigger. Now I know that molly guppy cross breading is hard and I had no intention of cross breading them but what are the chances that I have a guppy pregnant by a molly?