He knows she's dead. I forget which episode it was but he said something about her being dead and buried and she responded something about it being the house. Yeah, this show has no idea how to be consistent.

So how is it possible for a ghost to impregnate Vivien? Earlier in the episode Hayden said she couldn't get pregnant cause she's a ghost.

I saw this movie last year at the Phila. Film Festival (alone as none of my friends wanted to see it). It was every bit as disturbing as referenced but I think it deserves a higher rating than a D.
This was the first movie to give me lasting nightmares.