Bored and horny, Sister and Stepbrother find themselves home alone. She teases him in the kitchen, bending over to show off her ass in tiny shorts. He can't resist, pushing her against the counter and hiking up her skirt. She moans as he fingers her wet pussy, then guides his hard cock into her. He fucks her tight hole, making her gasp and claw at the countertop. She rides him, grinding her hips, until they both cum hard.