Misty turned in her bed, and sighed, realizing that there was no way she was falling asleep. She had decided to try and see if she could, but in truth, she simply wasn't tired and hadn't gone through whatever the others had. Yes, her interaction with Vita had been weird, but not overwhelming and it had only lasted for a few minutes.
There was also the fact that she had a vampire's constitution, and well ever since becoming a vampire she had become somewhat nocturnal, and her body simply knew when it was night. Her beast tended to get more active, though her control over it was far better than it had ever been and it didn't cause any problems, at least not in normal situations.