Title: Between
Pairing (if applicable): Riley/Dawn or Buffy/Dawn or Buffy/Dawn/Riley
Must have: The number three popping up everywhere, a 'harmless' prank that turns out badly, a purple pen
Bonus points: If you go the B/D or B/D/R route
Summary: Dawn gets jealous of all the time Buffy is spending with Riley and sets out to break them up. In the end she gets something none of them would've suspected.