Excellent dialogue in this opening chapter.  I was enjoying Buffy's rant at the vampire and how he was using it to play at being buddies and get out from under the imminent dusting.  Of course he was just biding his time, waiting for an opening.  The slayer was already a tasty morsel, and now she's all pregnant and vulnerable she just looks tastier still.

Spike jumping in to the rescue was hilarious as was Buffy's less than impressed reaction.  Their conversation seems to be one they have over and over and over again.  It's surprisingly fresh and funny and it looks like neither combatant are backing down any time soon.  It's very entertaining.

Great start and excellent dialogue!  What a surprise of a take on the Key! I expect the explanation is coming later so I am off to read more.

Fun story - loved Joe the Vampire - and how stupid is Spike that he can't figure out to send Buffy some flowers.  :)

 great start.  i love stories like this.

 intriguing! does she know her "bun" is dawn?