"If someone with a Lucifer's blood were somehow rendered healthy without changing their blood, and they grew up and had children with a mortal, they would have naturally healthy children all of whom were angels," she adds. "Not that that's particularly relevant, but just as an addendum on how that sort of thing works. I suppose in the instance you refer too...if I had to guess, there would be something about the angel woman's body that would make her miscarry a lucifer before it was old enough for the pregnancy to be noticed."