Her rocking hips did nothing to slow him down. He grinned up at her, smiling, enjoying every shift of her body, the flush of her face, the way her ribs heaved with her breathing. He just kept his thumb moving against her, insistent now as the thrust of his hips became a more stuttering pace. It encouraged more of a bounce of her own hips, making her breasts bounce and sway as well; he bit his lip around a smile.