Board Thread:Spoilers!/@comment-25375217-20150309010607/@comment-25926288-20150309014427

Or she shapeshifts, but the father could be a possiblility. My theory is that David is the father, with the true love potion being how she became pregnant.

Charming stuck the True love egg in Maleficent, woke up Snow, took back the kingdom, had a wedding, so there is enough time for both Mal and Snow to be pregnant.