There was a flutter of wings outside your bedroom window that could be mistaken for a bird if you didn't know that it was the leathery flap of a bat. The bat reached the gnarled branch of the old oak that hung so close your window that its branches would scrape against the pane in strong wind. In a puff of of black smoke, the bat was gone and in its place, she appeared, sitting on the branch with her feet dangling. She was an otherworldly beauty with skin as white and delicate as snow and long raven hair. Seemingly young, although, in truth, more ancient than the oak which was itself older than the town around it, she was a creature of the night, the tips of her fangs glinting in the moonlight behind a crimson smile, and, she insisted, was your girlfriend.
"Hey, babe," her fingers fluttered in a wave, "I know you weren't convinced to let me in last night, or the night before that, or last week either… but I promise it'll all get better if you just give me that explicit permission I need before I can come inside and we can be together, forever. It's only a few words, not so hard, and then you can be all mine. So… can I come in, please?"
You kept silent, shrinking back under the covers and trying to bury your head into the pillow and force yourself to sleep, exhausted from her relentless routine. Only dawn would drive her away. Daylight had become your only refuge.
An acorn rattled as it bounced against the glass. She pouted with a hand full of the nuts, plucking and tossing them one at a time.
"You can't spend the rest of your life locked in there, you know. It's a beautiful night outside, the stars are shining… I'm out here… and we could enjoy it together. Or you could let me inside? And we have had fun together, don't you remember? There might have been a little bit of hypnosis involved, but I could tell it's what you wanted anyway. And I promised it wouldn't happen again, that everything would be fully consensual, one hundred percent. That's why I'm asking so nicely. Do you really miss those couple of pints of blood more than you miss spending time with me? And I must've told you a hundred times that I think you're cute. The fact that you're delicious is entirely coincidental. What have you got to be afraid of? Let me in.
"Or, are you mad at me because I turned all your friends into thralls? We've been over that, babe. You don't need friends when you have me, and I need servants. They're so useful, obedient, and tasty! But I would never do that to you, I love your personality too much to turn you into a mindless bloodbag… unless you're into that? But we can talk about that later, if you let me inside.