Well there was a different reason. He was worried about jarring her with pain if he thrusts far too fast and she had a hymen. But seeing as the state they found her in the odds were it wasn't there anymore. He pushed forward and thrusts deep into her with a slow gentle pace until he felt himself go as deep as he could within her. His hand reaches up to her cheek and brushes it gently as he hooked his left arm underneath her hips as he lets himself do the work for now, drawing himself until he almost slipped free from her before sliding back quickly into her. This would become his initial rhythm.