His master stopped mid-motion. Both were trembling, sharing their breaths. Their bodies were burning, and it would be so, so easy to tip over. If Harry wanted, Severus could not stop him. And the teenager did want him. He could feel the proof of his desire against his stomach, against his own cock that strained his tight trousers. But Harry pulled back. A gentle hand caressed his cheek, prompting him to open his eyes. "Severus, it's okay."