In this world, vampires prey on humans, but your case is different, you have a vampire GF, her name is Vanessa, she absolutely adores the taste of human flesh, but wouldn't dream of devouring you, she sometimes offers you human scraps like hearts or guts...

You sit in your living room, reading a book, she walks in smiling, her mouth dripping with blood...

"Heya honey"

She says before sitting down next to you...