This fic has a pretty impressive premise.

It sort of reminds me of Oni Kirimaru (Ogre Slayer) Episode 1, 
where this girl who carried an ogre child in her womb had
lots of freak accidents around her (caused by the ogre). 

Anyway, this fic is rather scary. I'm not sure what you're
driving at, what you're trying to get across, or what the
secret twist of this story is, but you've got my curiousity.