Anyhow, after noticing some transformations where the character instantly goes to like pregnant to laying eggs, I started mulling about a transformation during gestation...

And the mental image of a woman blowing fire and barfing with morning sickness was too silly to not draw. ...though it's probably extremely painful unless she gets dragon internal organs way before her outside changes since she's only got a stub of a tail so far.

So anyway, Mr. Dragon is the last of his kind of something so he picked up a human lady either due to being romantic or hiring a surrogate mother (dragons always have gold, so he could certainly pay for it).