[Her back bumps against the wall and she leans against it, pressing her shoulders to it firmly. Her one hand pumps him, the other jerking his pants lower and lower off his hips while her leg curls around the back of his knee to keep him close. She sighs again, contently rising to her toes as her hips jut forward in a drawn out gyration. She bites his lower lip for emphasis as well, pinching it between her teeth.]