She may be level-headed and responsible for her age, but her age is still only 19, and as logical as she's been taught to be about things, she is also in love. His words make her smile as bright as the sun.
"You," she says firmly, "you don't go doing anything crazy like this vampire nonsense, though. I want to grow old with you. I want to have a baby or two someday, and live like life is supposed to be, and do it next to you. I'd like to learn from you and teach you..." She pauses to kiss his fingers. "I bet I could get a harp somewhere cheap."