What are They Doing?!

Author's Note - Greetings Literotica Community, and welcome to my first published story on the site. Enjoy!
"Axl! Axl! Come on, wake up!"
I was ripped out of an intriguing dream involving me and a gorgeous, well-endowed redhead I'd met at the gym by the sensation of a finger poking deeply and insistently into my shoulder and a distant but familiar voice calling my name. With a groan I took the plugs out of my ears and removed my sleep mask, essentials for me since I'm such a light sleeper. I blinked, looking over and seeing my twin sister Addy, short for Addison, sitting on my bed prodding at my shoulder, a worried look marring her cute pixie-like face. "Thank goodness, Axl, I didn't think you were ever going to wake up," she said, voice tinged with relief.
Yes, my name is Axl thanks to a mom who's a huge Guns n' Roses fan. Our basement is basically a shrine to the band, where she likes to hang out with her friends and blast their music so loud the next county can hear it. Moving on...
"What's going on?" I asked groggily as I sat up in bed, rubbing my eyes against the bright morning sun spilling in through wide-open curtains that my sister must have drawn in her efforts to awaken me, through which I could see the trees of the forest that lay beyond our rather isolated country house. "Is something wrong? Is someone hurt?" I asked, concern driving the fog from my mind. "Is it mom? Steve? Jess?"
Addy shook her head, causing her strawberry-blonde waist-length pigtails to swish back and forth. Come to think on it, I mused, my sister looked a lot like the girl at the gym, except the girl, Bree I think her name was, had darker red hair that she wore short, a slightly rounder face and a fuller figure than my sibling. She'd given me her number, and I was looking forward to calling her this evening and setting something up for the weekend, my cock already twitching in anticipation. I hadn't been laid since I broke up with my last girlfriend nearly a month ago, and I was ready to get back in the game.
"No, everyone's fine," Addy assured me, yanking me out of my pleasant daydreams, biting her lip as she considered. "Well, at least I think so."
I rubbed at my head as I looked toward the clock, which read a little past nine, irritated that Addy had woke me up not only early but had yanked me from a very pleasing dream over something she considered an emergency but probably wasn't. I love my sister dearly, but she does have a history of overdramatizing things. We'd both just graduated high school, doing well enough to get aid to cover most of the costs of our higher education. That's why mom had said we could have the summer to do as we please before heading to school in the fall, a situation I intended to take full advantage of, which did not include getting woken up by my sister and her imaginary disasters.
I was about to reply with something snarky, like if she'd finally decided to tell me which school she'd decided on attending. It was a secret she'd for some reason or other decided to hoard like a secret treasure, even from me. While I'd been satisfied to secure a spot at a nearby state school, Addy had really pushed herself to achieve, and as a result received generous offers from many prestigious universities, thanks to a relentless determination unlike any I'd ever seen. Ever since we were kids it'd been like that, once she set her sights on getting something nothing stopped her, especially when someone told her she couldn't have it. So when that idiot Winona Jenkins bullied Addy our freshman year and declared my sister would never make it into college, nothing stopped Addy until she'd proven her wrong, practically sticking her tongue out at the fuming bitch in her valedictory speech.
I was so damn proud of her, but also sad at the thought of us being parted for the first time in our lives. I was actually surprised how much it hurt, and part of me wanted to ask her not to go, but I couldn't be selfish and ruin the opportunity she'd worked so hard to earn.
Sorry, I'm rambling, which I have a bad habit of doing, especially when talking about my sister. Back to the story...
So instead of getting smart and probably getting a smack for my trouble, I took a deep breath and bit back my annoyance, reminding myself of how close we were and how flattered I should feel that Addy always came to me with every problem she had before anyone else, no matter how personal. She would even come to me about things it may have been better for her to talk to mom or our older sister Jess about.
But no matter how awkward, embarrassing or inappropriate I had considered it to be for me to be discussing some things with her, I had never turned her away or made her feel bad for coming to me, and I wasn't about to start now, especially since it would probably be one of the last times she did so.
"Alright sis, give it to me straight. What's the problem exactly?"
She opened her mouth to speak, but then Escort closed it. "Well, maybe it's better if you see, or rather hear it for yourself," she said, getting up and heading over to my door and opening it a crack, motioning me over with her hand.
Fortunately by this time the petrified wood I'd developed from that lovely auburn-haired vixen had mostly softened, although still demanding appeasement as soon as I dealt with whatever it was that was bothering my sister. So I threw off the covers, stood up and stretched my limbs as I did every morning, studying my sister as she leaned her head out the door, intent on something beyond.
Maybe it was the way Addy was standing, slightly bent, her backside jutting playfully back toward me. Maybe it was those especially high-cut bright red running shorts she was wearing, showing off not only her long smooth legs toned through four years of a rigorous exercise routine, but that in her bent position also flashed just a hint of her shapely ass cheeks. Or maybe it was because I was a horny teenager, the heat aroused from the as-yet unfulfilled fantasies of that scarlet siren Bree still coursing through my veins, but I felt myself becoming hard again.
What are you doing?! I berated myself in my most admonishing mental voice, banishing those degenerate thoughts. It wasn't the first time I'd had such fantasies, but it'd never been with my sister right here in front of me. Addy loved me, trusted me, how could I even think of using her in such a disgusting way? I scolded myself. Conjuring images of everything unpleasant I could think of to deflate myself both mentally and physically, I joined my sister at the cracked door. "So what is it?" I asked, looking out into the hall but not seeing anything unusual.
She put a finger to her lips, shushing me quietly as she cupped her ear with her hand, indicating that I should listen. I fell quiet as I leaned my head out, listening intently. And that's when I heard it - what sounded like muffled cries and groans coming from behind the closed door at the opposite end of the hall - our older brother Steve's room. Both he and Jessica, our older sister, a junior and senior in college respectively, were both home for the summer.
I frowned, wondering if Steve might be sick and if I should check on him, when through the peculiar masculine sounds there arose a distinctly feminine shriek. "Oh yes, Stevie, you're doing just great, keep doing it just like that. Fuck!" I heard a woman's muffled voice call out sharply.
I quickly closed my door and leaned against it, my stomach lurching and twisting into knots. Even from this distance and muffled by the door, I know that voice, it belonged to my sister Jessica.
I looked over at Addy, who was staring at me wide-eyed. "Jess is in Steve's room," I said stupidly.
"Yeah, I figured that much out. But what are they doing in there?" she asked.
"It sounds like they're...they're...shit, I can't say it," I said, my mind unable to wrap itself around the enormity of what I was asking it to process, my tongue unable to speak the words to my sister. I went over and sat down on the bed.
"Fucking," Addy said flatly, her eyes still saucers. "I mean, that's what I thought, and if you think that too..." she trailed off, as appalled as I was that our older siblings were daring to do such a thing, and so loudly, with us in the house. "I had no idea that they were...together like that. Did you?" I asked her, my voice sounding weird in my ears.
She came back over and sat down beside me, shaking her head. "I mean, I noticed they were unusually chummy after they got back from college, but to be doing that," she swallowed. "I never saw that coming."
Especially subjecting their baby sister to such a thing. Not that we were exactly innocent in sexual matters, but still it made my blood boil thinking of my twin sibling, whose room was next to Steve's, being woken to the sound of...that, fury replacing shock. And there was a tinge of something else too, was that...jealousy? No, couldn't be, I told myself, focusing on my anger and burying everything else, determined not to let them get away with this. "Where's mom?"
"At work, someone called in and she had to cover," she replied, her voice strange and distant as she stared straight ahead, transfixed as if seeing all the way down through the door and down the hallway into Steve's room, seeing our older sisters entwined.
"Well, thank goodness for that," I muttered, groping around in the disheveled covers.
"What are you doing?" Addy asked in that unearthly tone, eyes still locked on the door.
"What do you think?" I said, finding my phone and unlocking it. "I'm calling mom and telling her what degenerate perverts Steve and Jess are. Hey!" I exclaimed as the phone was yanked out of my hand.
"Wait a minute," she cautioned as she put the phone down on the other side of her, looking back toward the door. "We don't Escort Bayan know with absolute certainty what they're doing in there. It could be something completely innocent. Loud, but innocent."
"Oh yeah, sure," I said sarcastically, "I'm sure Jess is just in there teaching Steve some new yoga moves she learned online, and she was just shouting out her encouragement on how well he's carrying out his technique." I rolled my eyes. "Come on sis, surely you don't really believe that."
She shrugged. "Well, maybe not," she conceded, "but even if they're doing what we both think they're doing, we have no proof, so it'll be our word against theirs. Something solid, like pictures or a video recording that they can't wiggle their way out of."
I gritted my teeth, knowing she was right, feeling queasy as I realized what getting that proof would entail. "Alright," I said holding out my hand to her. "Give me back my phone, I'll go get the proof we need."
"I'm going with you," she said firmly as she handed me back my phone. I wanted to argue, saying she didn't have to subject herself to any more of our siblings' antics than she'd already had to endure. But I knew that look she now had in her eyes, the one that said I'd have better luck teaching our cat to tap dance than to change her mind. "Alright," I said, standing up as I opened the camera app on my phone and switching it to video record, "stay behind me and stay quiet."
"Okay."
Silently we crept out of my room, both in our bare feet to minimize noise, not that Steve or Jess would have heard us even if we were both banging on drums. We made our way past the stairway toward the far end of the hall, the sensual noises becoming louder and clearer as we slowly made our way up to the closed door of my brother's room.
I came to a stop right in front of it, the carnal sounds within now unmistakable for anything other than what they were. There was no longer any doubt as to what was going on behind this door, now all that remained was to capture evidence of it. Addy was right behind me, so close behind me that I could feel her warm breath on my back through the thin material of my t-shirt and smell the sweet yet musky aroma of her wildberry body wash blended with her own natural scent that I for some reason found tantalizing. I shook away the lurid thoughts that were coalescing in my brain as I turned back to her, a finger over my lip to indicate not to make the slightest sound, and she gave a nod of acknowledgement.
I could feel my heart thumping wildly in my chest as I turned back to the door and wrapped my clammy hand around the cool metal of the knob, turning it ever so slowly, surprised to find it open. Part of me had hoped that it would be locked, giving me an excuse to back away from this whole situation because even though part of me was still furious at my older siblings for exposing Addy to their questionable activities, another part of me was starting to whisper that I should leave them alone to their passion, or at least talk to them before unloading all this on mom.
But here I was just outside the room where Steve and Jess were committing one of the oldest taboos known to the human race, my phone in my hand, my sister who had been awoken by their forbidden lust right behind me. They had brought this on themselves, I reasoned, by not only engaging in this unspeakable act with Addy and I at home, but by being so over-the-top about it and leaving their door open for anyone to walk in on them. What did they expect, a congratulatory letter commending them on their bold and decisive action?
With extreme caution so as to not make even the slightest sound, I pushed the door inwards a few inches, just enough to fit my hand and phone through. The curtains were still shut in our brother's room, but there was enough light for my camera to work, I figured as I aimed it toward my brother's bed and hit record with my thumb, averting my eyes. This may be necessary to convince mom, I thought, but that doesn't mean I had to watch it.
But while I was able to shield my eyes from the perversion happening within, the same could not be said for my ears, which now had full and unobstructed access to every sound emitting from within - the squeaking of the bed, the wet slapping of naked flesh, the heavy breathing and primal grunting as my siblings surged toward the pinnacle of a union that should never have happened. But the worst part was their dirty talk.
"Oh, fuck, Steve, this is amazing!" I heard my sister Jess squeal in delight as the squeaking of the bed increased. "I've never felt so amazin' in my life! Why did we wait so long to do this?"
"Fuck if I know," Steve replied breathlessly. "But we're doing it now, and we ain't ever gonna stop!"
"You got that right!" Jess seconded, and they both went quiet as I heard a wet, suckling sound as I assumed that they kissed. "Your cock is mine now, and I ain't givin' it up for nothing Bayan Escort or nobody!" she declared. "Now, pound me hard and make me cum like a good big brother!" she growled, almost as if she was reading from a porno script.
I felt myself flushing with heat as a minute passed, then two, three. I idly wondered how Steve was taking Jess, whether from the top, side, or behind, wondering if he was squeezing on those huge tits of hers, heck, he'd be crazy not to... What am I doing? I reprimanded myself harshly, looking back at Addy. Like me her face was reddened from what she was hearing, but otherwise unreadable. Enough of this, I said to myself, we have sufficient evidence for mom now, no reason to continue forcing my baby sister to any more of this shocking spectacle.
But just as I was about to withdraw my arm and shut the door, Jess emitted a high-pitched scream from within as Addy and I just stared at each other, mouths agape, knowing that Jess had just cum on Steve's cock, followed by a loud grunt indicating our brother had climaxed as well. From fucking our sister. Inside our sister.
I recovered my wits enough to bring out my hand and shut the door quietly, trying to recover from what I'd just experienced. Let's go, I mouthed to Addy, gesturing back towards my room as I began to slink back down the corridor. Holy shit, I thought, they've done it, they actually had sex together, I screamed within the confines of my mind, trying to ignore the stiffness flowing back into my cock, refusing to admit that in addition to that being one of the most shocking moments of my life, it had also been one of the most erotic.
I was past the stairs when I realized that Addy wasn't with me. I turned around, and my guts turned to ice on seeing her sidled up against Steve's again-open door, peering inside. Quickly and stealthily I made my way back over to her, grabbing her arm and gave her a what-the-fuck-are-you-doing?! glare as she turned back to me, giving me a sheepish grin as she again brought the door shut and we both retreated back to my room and collapsed on the bed, both of us letting out a long exhalation of breath we'd been holding in. "What the fuck was that?" I asked her. "You about blew the whole thing!"
She looked at me with that sad, apologetic puppy face complete with warbling eyes that she'd mastered when we were kids, and immediately my anger faded. "I...I'm sorry, Axl," she stuttered. "I can't really explain why, but I had to see what they were doing with my own eyes."
"It's alright," I said sympathetically, my eyes flicking back down the hall, our brother's door thankfully still closed, Jess and Steve obviously still cuddling or whatever it was you did after having sex with your sibling. I got up and shut my door, providing another barrier against it. "No harm, no foul. Are you alright?" I asked, more concerned now than upset, for I hadn't even seen our brother and sister directly, yet my brain still felt like it had been put through a blender on high speed. I could only imagine what Addy was feeling, having actually seen them together.
She nodded, not looking dazed or traumatized like I'd expected, but instead appearing thoughtful. Maybe the full impact of what she witnessed hasn't hit her yet, I reasoned. "It wasn't what I expected, not at all. I...don't know if there are words for it or not, ya know?"
I nodded, my phone still gripped in my hand. "I know what you mean. Well, we got the evidence now, so do we call mom and lay it on her now, or do we wait until she gets home?"
Addy sat down on my bed, looking deep in thought. "Actually, bro, I don't know if we should tell her at all."
Not for the first time that day I found myself at a loss for words as I sat down beside her. "I'm sorry, I must still be dazed from that experience," I heard myself say at last. "It sounded like you said we shouldn't tell mom about this."
"That's exactly what I said."
I looked at her, blinking rapidly. "What they're doing is incest, Addy, and not that tame stepfamily stuff the porn sites are loaded with. We're talking full-blooded brother and sister banging each other senseless right down the hall from us, right under our very noses!"
"I know all that," she said, finally turning and meeting my gaze with a strange look in her eyes. "But still, hearing them, seeing them together... The intensity, the excitement, the sheer passion that they share is incredible. I know I've never had a sexual experience so intense, have you?" she asked, cupping my hand, studying me intently.
I flushed both from her gaze and the feeling of her small, soft hand over mine, squeezing it gently as she fell silent. She was right, in the quiet I I could still hear the sounds of our siblings going at each other in my mind. "No, but that's not the point," I protested, "What they're doing it's illegal, immoral, and downright crazy!"
"But they both seem so happy," Addy pressed, her hand squeezing tighter around mine. "It's not just passion, it's love they share, a deep and abiding love that drives them to pleasure each other so perfectly," she said, sighing longingly as if she envied them. "And if that's the case, how can it be wrong?"