“Wrecked,” by Marti Noxon
It’s the morning after, bigtime, for Spuffy, and it begins with Tara and Dawn waking up to discover that neither Buffy nor Willow has come home. The house is empty, and their improbably well-made beds haven’t been slept in. This is apparently unusual and worrisome, even though they could conceivably have been called upon for Slay duty.
In fact, though, they’re both slacking. Buffy is in the basement of a wrecked house, dealing with Spike’s post-sex happy dance. She’s not so delighted, and as he continues to warble the “Yay, we finally done it,” song, she ends up telling him he’s convenient.
“I may be dirt,” Spike ripostes, “But you’re the one who likes to roll in it.”
Ah, her shame is great.