I'm loving the plot and the characterizations. You need to work on your dialogue, the structuring is confusing sometimes. Generally the rest of the paragraph should agree with who is speaking. I'm not phrasing it very well but for example: "..." Buffy smiled. Spike groaned. "...." I would expect the dialogue beside the buffy line to be said by buffy and likewise the dialogue beside the spike line to be said by Spike. I respect that if in the middle of a Buffy rant you wanted to say that Spike looked sheepish you wouldn't start a new paragraph but if Spike said anything you'd want to start a new paragraph with Spike looked sheepish instead of taking it on the end of the Buffy rant paragraph. And now we've just seen a spectacular run on sentence so I understand if you don't want to take my grammatical advice. Just pick a book with a lot of dialogue and see how it's structured there. Keep up the good work.

Sweet chapter!