The tiny, eager brother, fueled by his sister's casual teasing, can't help but grow hard. She notices, her pussy throbbing with excitement. They discard the cards, their focus shifting to the throbbing flesh between their legs. She guides his small hands to her wet pussy, teaching him to stroke and rub. He eagerly learns, his tiny cock leaking pre-cum as he watches her pleasure grow. She takes him in her mouth, her enthusiasm matching his eagerness, until they're both ready to explode, her pussy dripping and his cock throbbing, ready for a creamy conclusion.