Sun and games.

"Time to get some sun," you say, as if the erotic scene that had just played out as if nothing had happened. Then you lie back on the padded lounge chair, placing your arms at your side and lifting your face until you can feel the suns rays splashing against it. Violet does the same, occasionally sending secretive peeks your way, mostly directed at your ill-fitting swimsuit. Lily and Kenny, both still recovering from their lust-filled rubdown, settle in quickly, eager to have an excuse to calm a bit. Unfortunately for them, it's only going to get worse the longer they're in your presence.

The next hour or so passes with little fanfare, each of you tossing and turning to ensure an even tan. You enjoy the view, watching your identical, redheaded sisters as they present their luscious bodies to the sky, tits and buns rising up like glorious mountains. Conversation is limited and light, just familial banter back and forth. And all the while, their arousal is growing, unstoppable as long as your near them. Kenny's erection refuses to die down, and you catch him rubbing his hand across his trunks 'accidentally' when he shifts positions, or when he watches one of the twins spin in their chairs. Both girls have developed a tic of rubbing their thighs together every minute or so, as if the heat building inside of them needs to be rubbed out but they just can't make it happen.

Finally, Violet says, "I think I'm going to cool of in the pool." She stands up and adjusts her purple bikini bottoms, making her ass bounce as she does.

"I'll join you," you say. When you get to your feet, your hard cock is front and center, pushing your trunks away from your body by a good two inches and you stretch to make it jut out even more. Violet licks her lips, then shakes herself. Lily actually moans but stays lying down in her chair.

With a couple of quick steps, you leap into the pool in a perfect cannonball, splashing cool water everywhere. When you surface, Violet is brushing off some droplets that hit her, sweeping them from her breasts and belly with little flicks of her wrist. She enters the pool more slowly, swinging her pretty legs over the side and then sliding in until the water crests above the slopes of her tits. She sighs contentedly, enjoying the sensation of the refreshing water against her warm skin, and closes her eyes, relaxing.

Which makes her a perfect target for your ****. Coming up behind her silently, you grab a generous piece of her ass and pinch it mercilessly. She screams in surprise, jumping out of the water by a good couple of feet, her breasts flopping around as she swings toward you in indignation. Lily and Kenny stare at her, sitting up to see what happened. Violet dives at you, trying to return the favor but you've already backed away out of reach. She chases after you, arms and legs flailing, pushing through the water with determined grin on her face. But you know the best part of the chase happens when the prey gets caught, so after eluding her for a while longer--which gives you a great opportunity to ogle her wet titties splashing about--you let yourself get cornered.

With a cry of triumph, she reaches around you and firmly plants both her hands on your butt, her fingers digging into you like talons. Instead of fighting her off, you do the same as her and the two of you end up in a slippery embrace, cupping each other's asses with your hands, bare chests sliding against each other and your thick rod pressing against her fiery cunt. Violet stops when she realizes what happens and for a moment, you think she's going to pull away, but then her eyes soften and she leans into you, playfully rubbing herself against your muscled body.

She feels fucking fantastic and you'd like nothing more than to rip her bottoms off and slip inside your sister's sweet puss.

"What are you guys doing?" Lily asks, her voice a bit husky. She knows exactly what's happening but she can't quite believe it. The moment is broken between you and Violet though. You decide to turn up the heat.

"We're starting a game of Marco Polo. You guys want to join us."

Kenny and Lily nod their agreement and quickly join you in the pool. "I'll be Marco first," you say. Closing your eyes, you give them all a moment to find their spots. And then you begin the game.

You specifically target Lily, listening for her voice and then speeding toward it like a bullet from a gun and it only takes three repetitions until get her shoulder. Smiling, you kiss her swiftly on the lips and say, "You're it."

Flustered, Lily starts off slow, clearly unable to focus on any of your voices. For a while, she just wanders around the shallow end, her boobs floating serenely on the surface of the water, arms spread out in the hopes of catching someone. She finally lucks out when Violet slips trying to get away from her, and Lily is treated to a great big handful of her sister's wet melons. When her eyes pop open and she she's exactly what's she holding, she doesn't pull away but just continues to gaze at where they're connected for a long minute. It's Violet who pulls away to take her turn as Marco.

Kenny is the loser of the next round--if you can call it being a loser when a hot girl ends up with her hand on your dick. Violet goes low with her tag and she's successfully grabbed both of her brother's cocks in the span of a morning. Not bad, you think.

After that point, it becomes almost an unwritten rule that when a person is tagged, it has to be on their private parts and your game basically becomes one big session of grab-assing. Kenny gropes Lily's butt, Lily catches the waist of your trunks and frees your leviathan--you take a good while stuffing it back in--, Violet lets you slide your fingers along the fabric covering her pussy lips and then she does the same to Lily. Everybody's panting, but not from exertion.

The final round starts with Kenny being 'it.' As he searches for somebody to touch, you slyly grab Lily and place her in front of you as a shield. She gasps as you wrap your arms around her almost naked body, you dick digging between her asscheeks and your settling a happy place just below her big boobies, your fingers brushing against their soft curves. Her hips buck, pushing against you almost like an animal in heat. Violet, being the odd man out in this scenario, slips behind you so that both you and her sister are between her and Kenny. You're sandwiched between the twins, feeling both of them pressed against you and enjoying the moment, when Kenny crashes into all of you.

You all end of in a chaotic muddle. Violet's hand has somehow made it's way into your trunks, Kenny has found himself motorboating both of Lily's tits, which you are currently squeezing, and Lily's bikini bottoms have somehow slipped down to her ankles. You wait, hoping, wishing for one of your siblings to make the first move, to give into their desires and tip over the first domino that will lead to an orgy of incestuous delights. You want their walls of propriety to crumble and for it to be their choice. It takes all of your willpower not to give in yourself.

Lily twitches and...pulls herself from the pile. "I have something I need to take care of," her voice higher pitched then normal, not caring that nobody believes her for a second. Kenny recovers next and hustles out of the pool as well. You look at Violet and you think for a moment she might give in but she gives you a tiny shrug and joins her sister.

Prick aching like never before, you climb out of the pool as well and by the time you've dried yourself with you towel, everyone has gone inside. Once back in your room, you replay the morning in your mind will you stroke your cock, giving yourself the relief that you'd missed earlier. Not long after you finish, you hear three cries of release coming from down the hall where your sibling have done the same, including the twins who share their room.