As Phip and Julia drove to the beach, Phip couldn't get the sight of his mother's bare breast out of his mind. He had clearly seen the pink nipple standing erect, with his father's hand cupped around it, and Dad had made no move to hide it, or how his hand was groping it. He thought his parents were probably fucking right now, and his dick sprung upright in his shorts. He reached to adjust his pants, glancing at his sister as he did so. She had on one of his old T-shirts, which ended high on her naked thighs. Underneath he knew she had on a new string bikini, and he could see a hint of it through the thin cotton top.
Her dark hair was cut short, and flared to fit her face, accenting her high cheekbones and pouty, full lips. She looked a lot like their mother, he thought, the same firm small tits, though he hadn't seen Julia's bare one for a real comparison, the same dark hair, both cut short, hazel eyes, and long, slim legs that they loved to show off. He couldn't decide who was sexier, his mom or his sister. He really wanted to see Julia's naked tit, and the flash of her bare thighs was sending chills up him as he drove, making it hard to concentrate.
Finally they arrived, and as Phip got out, he noticed his hard-on was still pushing out at his shorts. He stood by the car for a moment, willing it to deflate a little so it wouldn't be so obvious on the beach. Julia ran off, teasing him. "What's the matter, got a hole in your pants," she shouted over her shoulder. He watched her round butt bouncing away, the T-shirt lifting to reveal glimpses of her shiny blue bikini bottom. Finally he ran after her, carrying the beach bag with him. When he caught up, she was already peeling off the oversized T-shirt and kicking off her sandals. He dropped the bag and caught his breath as her arms went over her head, making her breasts stand at attention under the tiny bikini top. He thought he could gobble her up right there, she looked so damn delicious, her tits rising seductively on her chest, almost popping out of the little top. He thought he caught a glimpse of a bare nipple as she bent over to toss her shirt and sandals into a pile, then bobbed off, her ass bouncing wonderfully across the sand, the bikini bottom riding up into her ass crack as she ran. Phip looked down and discovered his hard- on was bigger than ever. He dashed into the water after his sister.
When he got out, he found her already back at their blanket, with her beautiful butt sticking up for his inspection, her arms at her sides. "Rub some lotion on me, would you?" she said as he came dripping up to her. Phip toweled himself off, found the bottle of sunblock, rubbed some in his hands to warm it, and began massaging the silky lotion into his sister's golden skin. The touch of her bare back and the sight of her rounded ass cheeks peeking out of her skimpy bikini bottom was bringing his erection back.
"Undo my top," she said, and Phip felt lightheaded. Gingerly he untied the bow that was all that held the minuscule top in place, watching it nestle softly on the blanket. The edges of Julia's tits were now exposed to his gaze, as he began slowly rubbing the lotion all over her back, feeling his hard-on starting to throb in his trunks and his pulse begin to throb in his temples. He smoothed the sunblock down her luscious long legs and thought he would die with pleasure when she spread them as he moved up the thighs toward her honey pot. He could almost feel the heat emanating from her barely concealed pussy. He moved back up to her back, rubbing smoothly at the hollow between her shoulders and neck.
He leaned close to her and whispered hoarsely in her ear, "You look terrific, sis. You're making me horny."
Julia raised her eyelid and looked right into Phip's crotch. "Yeah, I can see that," she said. "What you wanna do about it?"
"Well, I, um, I......" he stammered.
Julia sat up, gathering her top and tying it behind her in one smooth motion. She looked him right in the eye and said, "How about if we go where it's less crowded so we can talk. You know that double party thing is coming up and I'm wondering what to get for Dad and cousin Cindy."
"Sure, how about the grove of beeches, you know, where we used to go when we were kids?"
As they headed up the coast highway toward the woods, Phip thought about his mother's naked tit, his sister's wild suggestion, and his cousin Cindy, just a year younger than his sister Julia. He was driving automatically, having gone this way many times before. He was stirred out of his lustful dreaming when his sister leaned across the seat and ran her fingers up his naked thigh.
