Pregnant female guppy?

ok so heres the story. i got a female guppy about 3 weeks ago, i paired it up with the male for about 5 days then put them both back in the tank. about a week before she was due, i put her into a breeding thingy, one of those cages that floats in the tank, and i just realized that the dad has to fertalize the eggs, would he have already done that, she is due in about 3 days