Sib Games

Amber has always liked it hot.

You think you're having warm shower after my big sister has been in the bathroom? Forget about it.

She'd spend hours in the tub, the room thick with steam, and emerge pink, shining, and content.

"Mom! Amber's used all the water again!"

"Share next time."

Of course, she never did. Who wants to share a bath with their annoying little sister?

It wasn't until we were much older that I discovered why she really spent so much time stewing herself behind a locked door.

Like I said, Amber really likes it hot.

--

The steam was so thick that I couldn't see any further than the women showering either side of me. Even they were indistinct forms. I rested my head against the cool tiles, letting the piping hot water run down my back, and enjoyed the solitude.

"Skye? Is that you?"

The figure beside me stepped closer. She was dripping wet and unashamed of her nakedness.

"Oh, Molly. You got through."

"Uhuh. Still here. Did you have to..." Even in the warm environment, Molly's cheeks managed to find a darker hue of pink. "...never mind. We're both here. That's something."

In the silence that followed, Molly's gaze slipped down my body. Her eyes widened as she stared brazenly at the slight swelling of my stomach.

"Oh my god, Skye, you're..."

"Shhh!" I hissed, glancing around the communal showers, "keep your voice down. My sister doesn't know."

"But you shouldn't be here."

"Well, duh. None of us should."

"No, I mean, someone should tell the goons. They might let you out."

"You don't think they know already? I've been here before, remember? I won."

"But then why are you...how did you...who?"

I saw the penny drop. Eureka.

I stepped out of the stream of water, silencing Molly before she could blurt out the truth. My hand closed across her mouth.

"Not another word, okay? Our sister doesn't know."

Belatedly, I noticed the way our naked bodies pressed together, her full breasts squished against my little buds. Flustered, I stepped back.

"Our sister doesn't know what?"

Of course Amber chose that moment to reveal herself. That's big sisters for you. She squinted suspiciously at me through the steam.

I'd seen my sister naked before. What sister hasn't? Quick glimpses in the bathroom when we're rushing to get ready. A flash when she storms into my bedroom to reclaim the top I stole. But never so flagrantly, in all her glory.

Amber's arms were folded beneath her perfect, tear drop shaped tits, forcing the double D's upwards and together. As if they need emphasising, I rued. I was a little surprised to see a metal bar pierced through one nipple. She'd always been the good kid. The reliable child. I guess that was her little act of rebellion.

My gaze slipped down her body, across her washboard abs, to the thin landing strip of hair above her tight little pussy. My sister's pussy. Yikes.

"Eyes are up here, Skye," Amber said, derisively, before asking again, "what don't I know?"

"I...uhh...it's not really...well...fuck!"

Freezing water was shooting from the shower above me. I gasped, jumping away from the frigid stream, as dozens of piercing screams echoed around the showers.

Molly and Amber shrieked and we joined the crush of naked women rushing to escape the bitterly cold water spraying out of the showers.

Inwardly, I thanked my lucky stars. Nothing got my sister moving quicker than a cold shower.

--

"Why does Skye get the middle?" Amber asked, her words barely audible over her chattering teeth.

"Cus I ate most of the cream pies," I retorted, snuggling tighter between my brother and sister and pulling the thin duvet over my head.

I was still pissed at Tim for taking Amber's side but my anger was on ice for the moment. Literally. The temperature in the dormitory hall had been turned down so low that our breath was rising in small clouds above her faces.

And yet, somehow, Tim still had a hard on. I scowled over my shoulder at my brother as his cock poked my hip.

"Really?"

"I can't help it...the last game was torture."

"Watching your sisters guzzle your cum? I can only imagine your pain."

Tim's throbbing cock twitched against me. Swiftly, before he could protest, I reached back, fished it out of his boxer shorts, angled it beneath my nightie, and slipped his pulsing length between my thighs. Nuzzling the hot length of brother-cock against my pussy, I sighed contently.

"Don't get any ideas. It's warm, that's all. I'm still mad with you."

"You're mad with me?" Tim repeated.

There was a sudden gust of cold air as Amber ducked her head beneath the duvet to join us in our frigid cave.

"What are you two whispering about?"

"Nothing," Tim and I answered in unison.

"Nope. I've had it with the secrets. The twin pact ends here."

"Like you and Tim never kept any secrets from me," I countered.

"What...what are you talking about?"

"Skye," Tim warned, shifting his hips in attempt to dislodge his cock from between my thighs. The thick ridge of his glans dragged over my clit before I was able to clamp my legs tighter around his shaft, trapping his hot log with his tip enveloped in my folds.

"I hate to say it, but Amber's right." I said, "I don't want to fight any more so we need to be open with each other."

Amber's face was inches from mine. I stared her dead in the eye. It was time to come clean.

"I know about the sauna. Y'know, the butt stuff. "

"What?" Amber gasped. "Tim!"

Amber lunged over me and thumped Tim hard on the arm. During the sudden flurry of movement, I felt his cock stretching me open as his helmet sunk into my rapidly dampening pussy.

"S'okay," I mumbled, holding Amber back from a second assault on Tim, "I'm over it. Kinda. I just wish you hadn't lied to me about it. I felt...left out."

Amber softened. She stared at me, those big doe eyes filling with tears, and squeezed my hand.

"I didn't mean to...I would never...it just sort of happened."

"I get it. Your butt is irresistible."

At the mention of Amber's butt, I felt Tim's tip jerk inside me and instinctively arched my hips back to take another inch of beautiful brother-cock inside me.

"Thanks," Amber laughed, "but we both know you got mom's genes in that department. Isn't that right, Tim?"

"What?" Tim grunted, distractedly.

"Skye's got a killer ass, hasn't she?"

I risked a slight roll of my hips and his thick dick edged a little deeper inside me. I might have been irked with my brother but he still had a fabulous cock and it was quickly obliterating my inhibitions.

"Uhuh," Tim mumbled.

"For fuck's sake, Tim," Amber chastised, "you can do better than that." To both our surprise, our big sister suddenly reached over my hip and grabbed a handful of my bum. "It's perfect. A wonder-tush. Out of this world."

I jolted as Amber emphasised each compliment with a gentle spank of my ass, gasping as Tim sank deeper into me, painfully aware of how close our sister's hand was to pulsating pillar of brother-cock beneath my nightie.

"It all started in the sauna. You know how I like it hot and, well, it was the only place I could get any privacy at Mom and Dad's. That's what I thought, I hadn't counted on our brother sneaking around in the middle of the night."

I laughed, enjoying Amber's touch as she traced small circles on the silk nightie covering my pillowy behind.

"Anyway, all my friends were talking about it, y'know, butt stuff, and I was curious. So I decided to experiment a little. You know how I get when I can't solve a puzzle. It drives me mad."

"Little-miss-know-it-all," I teased.

Amber spanked me again, harder, enough to sting even through the nightie. I jerked backwards, feeling half Tim's length sloshing through my hot, wet pussy.

"Fuck!" I gasped, more at the brotherly penetration than the pain.

"Sorry," Amber laughed, squeezing my tush tenderly where she'd spanked it, "but you really do have a very spankable ass. Anyway, like I said, Tim was only helping me, y'know, get to grips with it."

"Did you ever do..." I began, sighing softly, as Amber's exploratory touch found the hem of my nightie. Her fingers brushed over the sensitive skin at the back of my thigh just below the crease of my ass. She was so close, just a few inches, from discovering Tim's cock protruding from between my legs. I knew I should stop her, but I couldn't.

"Anal?" Amber finished. "Nuh-uh. Well, not really. Came pretty close, a couple of times. But we had rules, rules to stop anyone getting hurt, to stop it going too far."

As she spoke, her fingers brushed upwards, dragging my nightie up, up, and up, until my entire peach was exposed.

"She really does have a great booty, doesn't she Tim?"

"It's...it's perfect."

I couldn't believe it. Amber was exposing me to our brother, encouraging him to ogle my bum as she gently groped my cheeks. I shivered as her fingers followed the valley between my cheeks, dipping towards my sensitive rosebud, before taking a handful of pillowy flesh and spreading it to give Tim an even better view.

"Holy cow..." Tim sighed, as his cock swelled inside me, filling me, stretching me, making me reckless.

"You see, sis," Amber whispered, her lips inches from mine, "our brother is an ass guy. And you've always had the best bum out of the two of us."

Maybe it was Tim's schlong teasing my horny pussy. Maybe it was Amber's sensual touch on my tush. Or maybe it's just that I'm a cum-slut sister. Whatever the reason, at that moment, I felt an overwhelming love for my big sister.

So I kissed her.

It wasn't planned. My lips found hers, tentatively, nervously, and before I knew what I was doing she was kissing me back. It only lasted a moment and then we pulled back, laughing like school-girls, suddenly embarrassed, our eyes twinkling with mischief.

It was only then that I noticed the emptiness inside me. Alert to our danger, Tim had taken our distraction as an opportunity to drag his twitching cock out of yearning pussy. I desperately threw my hips back, searching for his cock, but only succeeded in mashing it through my lips until his sex-slick tip shot past my clit. Straddling his length, I clamped my thighs tight around him.

"Okay," Amber said, smiling coyly, "it's your turn. I want to know how you got out of her last time. I mean, you clearly didn't lose, 'cus you're not, y'know, inseminated. So what happened? Did you break out?"

"No," I answered, choosing to ignore part of Amber's question, "They let us leave because...we won Sib Games."

"You won?" Amber gasped. "But that must mean...a million pounds! You're rich!"

"Not exactly. We split the winnings with our friends. They weren't so lucky."

"Oh my god, the pregnant couples at the pub on Christmas Eve?"

I felt Tim stiffen behind me. "You followed us?"

"I'm sorry but you were acting weird and you know how I get with mysteries," Amber said, defensively. "So the goons really do, y'know, knock up the losers?"

And the winners knocked themselves up, I thought sliding my pussy along the very penis that had impregnated me a few months before. Amber didn't need to know that. Not yet. One step at a time.

"Yeah," Tim answered, his voice cracking as my wet folds massaged his shaft, "they're not joking. Everyone who loses takes home a baby."

"But that's...that's..."

Amber couldn't bring herself to say the word.

"Incest," I purred, wishing I could cross that line with Tim there and then. I was being teased to within an inch of my life. I needed cock.

And it must have shown. Amber frowned at me. She knew something was up. Her eyes travelled down my body and her jaw dropped.

With all my wiggling and jiggling, I'd accidentally shimmied the front of my nightie up and over my hips, revealing my little shaven pussy and the raging tip of Tim's cock sticking out between my thighs.

"I guess that's my fault for showing our brother your perfect ass?" Amber whispered.

"It didn't help," I said, smiling shyly.

"I never saw it, y'know, when we were in the sauna. It was one of our rules. Now that I have, I'm kinda glad I didn't. Our brother has..."

"...a perfect cock," I finished. "You're not mad?"

Amber shook her head slowly, mesmerised by the length of dick between us.

"What are you two whispering about?" Tim asked, suspiciously.

"Nothing," Amber and I answered in unison.

"I thought we weren't doing secrets."

"It's different with sisters," Amber argued.

"Yeah, it's girl code," I agreed, rocking my hips to distracting Tim with another stroke through my pussy.

"I had my suspicions, y'know, when he was eating your ass. And the cream pies... no one likes cum that much. A hunch is one thing...seeing your brother's cock hotdogging your little sister's pussy is something else all together."

"It's a lot to take in," I laughed.

"It sure looks like it is," Amber said, a trace of awe in her voice. "Are you two, like, a couple?"

Good question. Was I anything more than Tim's cum-slut sister? Recently, I wasn't so sure.

"It's complicated," I answered, unashamedly grinding my pussy on our brother's cock. "But it doesn't change anything between us."

"How can it not?" Amber asked, unable to take her eyes off Tim's cock sloshing through my folds.

I reached up and gently cupped my big sister's cheek. Our lips brushed again as I pulled her towards me. I felt her nipple piercing against my small breast, the metal shockingly cold even through her nightie.

"You'll always be my big sister. Always."

Our lips met again. I don't know who started it but the next thing I knew we were delicately making out, fearful not to break the magic of the moment. My brother was slowly sawing his cock through my wet lips while my sister was groping my ass and frenching me. It was too perfect, it couldn't last.

It didn't.

"Oh, fuck!" Amber gasped.

I pulled back, fearing I'd crossed a line, destroyed our relationship, but Amber wasn't looking at me. She was staring, bug-eyed, between us. Our brother's granite-hard erection had driven all the way through my insanely wet pussy and the well-lubed tip had bumped into Amber's nightie, straining the silk with a slimy trail directly above her pussy.

Reacting on instinct, I lifted the hem of Amber's nightie. She could have stopped me but all she did was watch as I exposed her beautiful pussy.

"S'okay," I said softly, "it's nice. Open your legs a little."

Amber teetered for a moment, before Tim's next thrust drove his cock against her navel. Then she folded. Her upper leg hinged outwards a little, clearing the path for Tim's next thrust. Time seemed to slow as our brother's glans emerged, dripping, from my folds, cleared the narrow gap between me and Amber, and slipped home between her thighs.

"Oh fuck," Amber gasped again.

Whatever Tim thought he was grinding against, he clearly liked it. His next thrust came quicker and more forceful as he sought out our big sister's wet folds. I was in heaven, the filling in a sibling sandwich, and it was driving me towards an earth-shattering orgasm.

Recklessly, I pulled Amber tighter to me. I could feel the heat from her pussy next to mine as our legs became entwined.

"Skye," Amber gasped. A look of utter terror crossed her face. "Skye!"

I felt it too. Tim had changed his angle and attempted to bury his shaft as deeply into my folds as he could. Unaware of Amber's position at the end of our sibling stack, it seemed he'd managed to sink his tip into somewhere else instead.

Amber pushed herself back from me and scrabbled to pull her nightie back over her waist. I heard Tim groan with frustration behind me. A quick glance down revealed his throbbing cock, obscenely swollen, protruding proudly from between my legs. The tip was shining with the evidence of all three of our excitement.

"Amber, it's okay," I whispered reassuringly, as I reached down and directed Tim's well-lubed cock towards my opening, "it's..."

"It's wrong," Amber condemned. "It's incest."

At that moment, I couldn't care less that Amber knew. I was glad we didn't have to hide our relationship any longer, that I could be who I wanted to be. That I could be Tim's cum-slut sister.

"No more secrets," I gasped.

Amber watched, torn between revulsion and desire, as our brother entered me from behind, burying himself balls deep with one swift motion.

Before she could decide which way to fall, a ear-splitting squeal of feedback penetrated our cosy den of immorality.

"Contestants! The third round of Sib Games will begin shortly. Teams must pair up with another team. You have five minutes to make your selection."

--

"Should we break up and find other teams?" Amber asked, unable to meet my eye.

"No," Tim insisted, "if we're together, we can help each other."

Somehow his erection had softened but, despite the chill air, there was still a bloated shape clearly visible through his thin boxer shorts.

"I'd like to go with Skye," Molly said, stepping towards me. "If that's okay?"

"Um, sure," I said, wondering if I'd imagined the older woman's glance at my slightly swollen belly. "But what about Luna?"

"Don't worry about me," the kooky little blond said, smiling absent-mindedly as she held her weedy brother's hand, "I'm great at making friends."

That only made me worry about the naïve siblings even more. Luna clearly wasn't winning any popularity contests.

"Don't worry about the little chicken," drawled a smarmy voice behind me. "I'll take good care of her."

It was Diego, the older latino man who'd been so outspoken before the first round. There was no sign of his earlier resistance to the games. Standing with one arm around his buxom daughter, Diego unashamedly leered over Luna's petite frame.

"See, told you I was good at making friends," Luna said brightly.

"Contestants, make you way to the doors!"

--

The goons herded us along a subterranean corridor of polished concrete. The footsteps of the remaining contestants echoed off the walls, setting a metronomic rhythm that lured us deeper into their lair.

Eventually we reached a section of corridor lined with glass doors. From our position at the back of the line, we watched as, one by one, the pairs of team were guided to a door and made to enter the dark spaces behind.

"After you, little chicken," Diego smirked, patting Luna on her tush as she entered the room next to ours.

"Don't touch her!" Luna's brother, Kyle, protested.

"Shut it, pip-squeak," Diego replied, shoving Kyle into their room before entering himself.

Then it was our turn. On the other side of the glass door was a dark room. The light spilling in from the corridor revealed that every surface was made of the same black, marble-like material that rose in four staggered steps on opposite sides of the space. The steps tapered as they rose, becoming narrower like the side of a pyramid, so that the top step was barely wide enough for one person to sit.

"It looks like a sauna," Doug said.

"You two," a goon barked, pointing his weapon at Tim and Molly and then jerking it towards one of the stepped walls, "on that side. The rest of you over there."

Amber, Doug, and I lined up with our backs to the other steps. The goon backed out of the room and shut the glass door behind him.

"The next game is The Floor is Lava. The temperature in your room will increase every minute. For both teams to proceed to the next round, all players must stay in the room until the allotted twenty minutes is up."

"That sounds okay," Doug said uncertainly, "there's nothing sexual about heat."

"The temperature in the room will decrease every time a player orgasms."

"Oh," Doug sighed, disheartened.

"Ready...begin!"

The floor below us began to glow a dull red. I felt the heat against the soles of my bare feet. Pleasant, to begin with, compared to the icy showers and frigid dormitory, but the temperature quickly became uncomfortable.