Stefan groaned as she moved against him, her muscles gripping him tightly - enough to make thrills of pleasure rush through him with every thrust -, guided by the arm around her waist. He could tell she was enjoying his touch by the way she rubbed against his fingers with every movement. He didn't stop his actions when she tilted his head to one side - if anything he became more desperate - shuddering at the feel of her tongue on his skin. "Do it," he murmured, giving an extra fierce push up into her. "Please, do it. Bite me."