Dressed in tiny shorts and a tight pink t-shirt, my lovely, buxom, fit, Latina step-sis was talking on the phone to her BF when I came in. She looked so goddamned sexy that I couldn't resist the temptation to pull down her shorts and thong, paw her bubble ass, and insert my cock into her tight slit. She didn't mind me fucking her and, after finishing the conversation, pleased me with superb dick riding.