Cool story. I love main-characters-vamped stories and yours is a goody.
It's nice that W and B didn't just turn automatically into some sort of super-souled vamps or the reverse, killing machines. You've got an interesting mix of 'I remember being good' going with 'my conscience has left the building'.
I don't know if I'm going for them to not get staked or not! Yay the inner confusion - a fic that makes me think. Hope there's more.