Day with your sister.

"Hey, lazy ass! Are you ever going to get up? It's almost noon already. What'd you do, spend all last night jerking off or something?" Your sister's voice is playful but jarring, and the remnants of sleep struggle to stick with you. Without opening your eyes, you stretch your body, raising your hands above your head and pointing your toes so that your entire body is taut like a spring. It's at this exact moment of vulnerability that Shelly slams something down onto your stomach, knocking the breath from your lungs and snapping you awake.

"Stop doing that, you dirty pervert! Now get your butt out of bed, I've decided what we're going to do today. Meet me downstairs in ten minutes or I'm going to leave you behind." She stomps from your room and slams the door, her muted footsteps hopping down the stairs in a quick rhythm.

Looking down, you see two things. First, your old tennis racket sits across your stomach, obviously the object Shelly dumped on you. You haven't seen it in years, ever since you left high school and quit playing, but your sister must have dug it out from the basement. And second, a giant white tent, made from the sheet on your bed and a monster hardon underneath. Shit, so when I stretched, Shelly got quite the eyeful didn't she? She called me a pervert, but given her porn preferences, I wonder how upset she truly was.

Setting the racket aside, you climb out of bed and walk to your dresser. Like the racket itself, it's been a long while since you've needed a tennis outfit, but you make do by pulling out a plain pair of black shorts and a grubby t-shirt you'd gotten for free at a carnival. Getting dressed helps you wake up a bit. Brushing your teeth and splashing water on your face does it even better. So by the time you wander your way downstairs, the last vestiges of the crazy dream from the night before are dissipating, and you're thankful for it. You need time for your **** brain to dilute the details down into coherent thought, so maybe this day with your sister is for the best.

Then you see Shelly, and your heart drops a beat. She's waiting expectantly for you in the kitchen, leaning against the counter top, her blonde hair pulled back in a tight ponytail. Your jaw almost drops as you drink in her outfit, which she obviously spent more time putting together than you did. She's wearing a loose, blue pleated skirt that hangs to mid-thigh leaving the large majority of her toned, perfect legs sticking out the bottom. Her top is molded to her big tits, low cut on top to offer a view of her sweeping cleavage but sliced off below so that her flat stomach is on display. The straps of her top are so thin, that her red bra straps are showing; you would have been able to tell the color anyway, since her top is so thin that you can clearly see one of her newly-bought bras underneath. Your dick, which had begun to droop since waking up, starts to rise immediately and you have to fight to make sure it doesn't pop free from your shorts.

Your sister notices your stunned reaction, and smiles big. It's at this moment that you realize that she had planned this whole charade out earlier, from waking you up the way she did to the revealing of her outfit just now. She's toying with you, and she's doing a pretty fucking good job of it.

"Ready?" she asks and, without waiting for an answer, bends over to grab her own racket. You stare at her breasts, which jiggle and jostle and threaten to fall out of her shirt, dazed by their motions. Shelly's built like a brick house and, this morning at least, she's not afraid of exploiting that fact. She's fucking teasing me, the little skank, you think without an ounce of malice. She straightens back up after what feels like an eternity. "Let's go! I'm driving this time!" She jingles the keys in her hand.

You follow her to the car and climb in the passenger side. The trip to the tennis courts isn't long, and you content yourself with stealing glances at Shelly while she drives, every chance you get. With both hands on the wheel, her breasts are crushed together, plumping them up and pushing them even higher on her chest. Down below, the subtle switching from gas to brake showcases the definition in her legs, with taut muscles ripples just beneath her silky, smooth skin. It's heady just being this close to her, and it's way too short of a trip.

Your destination, a nearby park you've been coming to since you were a child, is fairly secluded, with the courts tucked away in back, tall trees on all sides. Even on a Sunday, nobody else is around and you have the place to yourselves. Shelly starts to stretch and you do the same, but you keep getting distracted as your sexy sister twists her body into knots, pushing out her chest and swinging her long legs every which way. How did you never pay attention to how hot your sister was until a few days ago?

Your lack of warming up hurts you when you get to the first game. You're slower than normal, failing to reach the ball on multiple occasions as your sister whizzes them past you with alarming accuracy. And anytime you get a chance for a winning shot, it inevitably slams into the net. It's ugly. By the time the first game is over, Shelly is mocking you mercilessly.

"Didn't you used to be good at this, old man?' she yells across the court, laying her racket against her shoulder. "Maybe your advanced age is biting you in the ass? Want me to go easier on you, dear brother?"

You shake your head and shout back, teasing her. "I think maybe it's your clothes. Maybe if you weren't dress so slutty, I wouldn't be distracted!"

"Who, me?" she asks, raising a finger to her lips and striking a pose of pure innocence. But she can;t hold it for long and busts out laughing, a belly laugh that shakes her whole body. Talk about distracting.

The second game is much more even and, with a few lucky shots going in your favor, you come out the victor. Even so, Shelly doesn't give up her good-natured ribbing.

"Not bad, not bad. But do you really think you can _keep it up _for a rubber match?" The emphasis she places on those three words is plain to hear. "I mean, with all my...distractions?" She gives a little swirl, flipping up her skirt and making her boobs bounce wantonly. She giggles as she observes your eyes widening, your breath quickening. And as the third game begins, she tries out a new strategy and fights dirty.

Instead of playing fairly, she takes every opportunity to flaunt her nubile body at you. When picking up loose balls, she makes sure to turn toward and bend from the waist, ensuring a magnificent view of her hanging titties. When that's not enough, she gives her chest a little extra wiggle, sending her melons swinging like twin pendulums and sending blood rushing to your prick. She also contrives to fall to the ground on multiple occasions, always on purpose and always somehow ending up with her skirt askew, red panties--the same color as her bra--plainly visible. Not much is hidden by those panties, and after the third glimpse, you don't even try to hide your erection anymore. Your crotch is on overdrive, pulsing with each heartbeat.

Fate intervenes about halfway though the game. On one of her **** tumbles, she overextends and falls to the ground, gasping. You run to her, your hard cock flopping around wildly. As you stand above her, she looks up and finds it right at eye level, a repeat of this morning.

"Are you alright," you ask, concerned. It takes her a moment to answer, her gaze still locked in place.

"Uhm...yeah. I think I just pulled something in my right thigh," she says, placing her hands on the injured spot and rubbing hard.

"Here, let me." You fall to the ground beside her and push her hands to the side, replacing them with your own. The moment your fingers first touch her skin is superb, the warmth and creaminess making your whole hands tingle. You press in, searching for the strained muscle, guided by the stunned murmurs leaping from Shelly's mouth. She hasn't stopped you, but much of her body has gone rigid, focused completely on the connection between the two of you. It's something new, something special.

Then you realize it. Shelly, the sister who's tormented you for years, teased you and berated you, the sister who you've just started to reconnect to, is someone you want to protect. From injuries like this and more. She's absolutely the most beautiful girl in the world...and you're in love with her.

You become lost in this moment, adrift from the rest of the world, the concerns and worries of your life. Separate from who you were and who you are becoming. You feel confused and alone. So you do the one thing you can think of to reconnect yourself.

You kiss Shelly.

And she kisses you back.

Her lips fit against yours like puzzle pieces, interlocking and joining without any space between. It becomes deeper, your tongues flashing forward and fighting in each other's mouths, tasting the forbidden. Your sister moans, writhing beneath you. You want more, need more. Slowly, you slide your hands higher. But when they reach the last stretch, just before you press them against her panties, Shelly freezes.

Her eyes widen in shock, realization flooding her face at what's happening, how far you've pushed the boundaries between siblings. She panics, pushing you away and climbing to her feet. You see tears beginning to form in her blue eyes. She opens her mouth, trying to form words, but she can't. She just shakes her head and stumbles away, heading deeper into the forest near the courts and leaving you flat on your ass.