It wasn't that Ralph minded having Emma around. She was a cool older sister; kind, patient, and easy-going. She was his best friend, role model, and confidant. But Saturdays were his days to have the house to himself. While she was off at work or spending time with her friends, Ralph occupied himself with his own friends. Lately, he'd been getting a little intimate with one particular girl in his class - a girl named Rena - whom he had known since 1st grade. It wasn't anything really serious yet - mostly phone calls and (s)texting - but the way things were moving, it wouldn't be long before they shared thier first kiss, then petting, then on to Second Base. Then, of course, there was his websites. Ralph loved to surf the web for all sorts of free porn. He could spend hours while his parents were out and Emma was at work or play browsing for pictures of barely clad models, videos of girls touching themselves, hentai manga/anime, erotic stories, and his guilty pleasure - amature pics of nude or semi-nude college girls. This last one was a bit icky. The girls were not much older than Emma - probably around the same age - so while he enjoyed looking at them, he always felt bad afterwards if he masturbated to them.
Coming into the kitchen to see what Emma was up to (hopefully napping, sunbathing, or engrossed in a TV show, so she wouldn't bother him), Ralph found her dabbing up spilt water from her cleavage. Were she not his sister, he would have wanted to stare at this erotic sight: a busty girl, in a tight top, patting the exposed top of her boobs. But Ralph had too much respect for Emma than to stare, though he did feel his cock shift in his pants. Emma was, after all, a woman, and Ralph did have a thing for big tits.
"Whoa, careful there, Emma," he teased. "Your mouth is up here - " he guestured to her face " - not down there."
Ralph was a cute boy. He still had a childish face and seemingly childish build; but he was athletically built and had just the right combination of fat and muscle to not look scrawny and boney. It helped that he played football and baseball. Yet he wasn't exactly handsome. He was just "cute", but neither heartthrobbingly irresistable nor tough and rugged. After all, it was only recently that he and Rena had gotten beyond awkward childhood friends. He had dark brown hair, tanned skin, and was dressed in a green t-shirt with a clever phrase on it, khaki-colored shorts, and socks. He smiled his usual grin that he had given her ever since he was a small child.