Stefan was a little taken aback by her question. He raised his eyebrows slightly, forgetting to move her for a moment. He thought about it. It couldn't do any harm. She would heal almost as soon as he'd done it. Slowly he licked his lips, lifting her again before bringing her slowly back down onto him. "We can... give it a go," he said with a bit of a shrug. He hadn't actually bitten - really bitten - anyone during sex for a long, long time, but she hadn't done this before either so they could learn together. He gave her a little smile, resuming his movements of her, slow and deep, as he leaned up to nuzzle her neck. She smelt wonderful, as usual, and he always forgot how wonderful it was to be with her without wanting to kill her for her blood. He thought that would probably actually help him do this; this was relaxed.
He pressed a line of soft kisses to her skin over her carotid artery, imagining what her blood would taste like. What with the feeling of her surrounding his cock and the anticipation of tasting her blood, it only took a few moments for his face to shift. He felt the sharp sting in his gums as his fangs slid down, the skin around his eyes tightening as blood pulsed through his veins. He murmured soft promises of pleasure and no pain against her skin for a moment before he pulled his lips back from his teeth and, as gently as he could, sank them into her soft, cool skin. Blood immediately billowed from the puncture marks, filling his mouth with its sweet stickiness. She didn't taste the same as she had when she was human, but there was still a hint of her there, mixed with the flavours of the people who had donated to the blood bank where the bags they'd been eating had come from. Stefan drew his teeth back from the skin and lapped at the little wounds, swallowing down the blood as he pushed his hips up to meet her. Blood and sex were a completely intoxicating combination, he discovered, and doing all this with Elena made it even better than he'd thought possible. He moaned softly against her skin, closing his eyes as he sucked at the rapidly closing wounds. Eventually they were gone and he kissed and licked her skin instead, cleaning up every last trace of blood from her neck as he pulled her down onto his a little faster.