Fic: Intersection of Wildly Divergent Sets (B:tVS/Avengers; PG-13)

PG-13; B:tVS/Avengers; 2300 words. Challenge fic, from August 24; 7th in a series in progress.

Buffy's eyes widen as the flow of one-sided chatter continues, and she throws an alarmed look at Xander. "You gave her caffeine?" she says, horrified. "Today?"

( Intersection of Wildly Divergent Sets )

(x-posted to twistedshorts and at AO3)