Sometimes when he kisses her, she feels the still warm blood from his kills transfer from his lips to hers and tastes it on his tongue; and she devours his mouth then, trying to swallow as much as she can. It's sweet to her; a delicious treat because she insists on staying on the Stefan diet even after Stefan himself has long since left this earth.
She knows he does it to tempt her and it half-way works because she kisses back with fervor and he enjoys the roughness on those nights.
Typically, little Caroline is the gentle type—the type of vampire who was denied love as a human and is forever in search of it as a vampire. And he plays into this for her because he wants her to stick around so he does soft and caring and slow and gentle, taking her with sweetly whispered words and kisses and caresses.
But then there are the nights that he gets to love her the way he wants. The nights he kills—usually over her because the stupid fucking human fuckers seem to gravitate to her—and he gets to take her roughly against a wall or over a table. Holding fistfuls of her pretty blonde hair and biting her neck until the blood runs crimson over her breasts.
He loves her screams and the purple bruises that last only seconds before healing. Loves the tears in her eyes and the way she looks at him with desire and need and a craving she refuses to give in to.
The next morning, she'll turn in the bed to face him and she'll fix him with a glare. He rarely tells her how much he loves seeing the fire in her eyes, but he does love it—craves it really, so it's no wonder this happens way more often than she claims she'd like.
She doesn't hate the roughness, he'd know it if she did. She's not so breakable anymore and she'd tell him if she hated it. All she hates is the death. "You shouldn't have killed," she'll chastise him.
He has long since stopped trying to explain their nature to her. She's idealistic, wants to believe the best in people (especially vampires), and he must admit—at least to himself—that that's what he likes so much about her.
Two hundred years later and she's still the sweetest thing he's ever seen.