Wow! Insanely hot! And such a good story. I would love to read a continuation of this, something long and plotty with action scenes and plans for taking down V and relationship issues (hmmm Willow/Hermione femmeslash anyone?) and ... oh, my. You give so much to think about!
And what a change for Xander! I would never have thought about bringing all those parts together, but it does make for a better match with Severus. And you gave him his eye back, so sweet of you! :)