So, I've done alot of them, and just now Vingalmo sent me to turn Cairine in the Markarth Warrens into a vampire. The problem is I've received and completed thie exact mission before. I can't turn her into a vampire again, her dialogue is all vampirism now and it won't let me feed on her after seducing her. Anyone know of anyways to reset this? I can't reload a save, I'm hours in

. I'm going to try killing her to fail the quest.