Vicky's oh so Terrifying, Neutered Vampire

Vicky is related to the Slayer herself, friends as children and now going to college together the two are inseperable. However as Spike comes into the picture more secrets and missing nights begin to pop up between the two. Throw in a little humor and a chipless Spike and you have a story! (SEASON 4 THEN GOES SLIGHT AU) eventual spike/OFC (or female outside/OC)