Stefan smiled at her trust--it was a good thing, to be sure, and he marveled that it could be so freely given to a vampire so quickly from a human who had been raised out of captivity. It spoke to Elena's gentle character, and a natural submission.
He cuffed her wrists behind her back, which would encourage her to keep her back arched, her breasts lifted. When he was satisfied, he picked up the nipple clamps and eyed her nightgown with a frown, as if contemplating how to solve a complex problem.
It was white, practically translucent, the cups edged with decorative lace. It was femininity, virginity, innocence. Elena looked lovely in it, whether she'd dressed for Damon or for him, or even for herself.
He lifted each breast free from the fabric and let them hang free, exposed, while he admired the picture she presented. Then he carefully attached the clover clamp to each nipple, and brought the connecting chain to her mouth. "Hold this with your teeth," he instructed, softly. Each time she moved, she would tug the clamps. He could probably be content to watch her kneel and experiment, but he wanted to make sure she came, too. And not from a bite. Hence the vibrator.