A lonely, brooding immortal and the inappropriately young and impressionable individual she lusts after.
Ladies and gentleman, I give you the Sanctuary's answer to Twilight (with under 10 words in the whole scene changed, no less). Minor suggestion of something rather adult in nature:
Will: You're impossibly smart and strong. Your skin is pale white and so warm. Your eyes change color, and sometimes you speak like - like you're from a different time. You never eat or drink anything American. You don't go out in the sunlight. How old are you?
Magnus: I am one hundred and fifty-seven years old.
Will: I know what you are.
Magnus: Say it. Out loud. Say it.
Will: MILF...
Magnus: Are you afraid?
Will: No.
Magnus: Then ask me the most basic question: What do we eat?
Will: *likes the answer to this question*