📚 thin walls Part 7 of 7
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Thin Walls

Thin Walls

by Champspron
20 min read
4.79 (11600 views)
group sexincesttwinscollegebrother sister
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I know many of you all have been waiting a while for an update. Thank you for your patience. I have more to say, but I'll save it for the end.

---

After my lunch at Sydney's, I returned back to the apartment feeling relieved and satisfied. I caught up on some work, taking advantage of the rare calm in the empty space.

Towards sunset Emma came home, wearing a roomy sweater that both hid her frame and hinted at the body beneath. I realized how common it had become for me to see my sister this way.

Unaware of my thoughts, she smiled at me, giving me a kiss on the cheek before disappearing into her room, where she stayed until Syd finally returned from her weekend away. I stood up to give her a hug, but before I could, Emma's door flew open and both girls began squealing as they leaped into a hug. Syd caught my eye and gave me an apologetic look and blew me a kiss before Emma pulled her back into her room, likely to gossip and catch up on the past few days.

My ears were burning, and I figured I could probably listen in to what was being said through the walls if I wanted. But I decided to just put on headphones and finish up my work. The girls talked, laughed, and probably schemed until it was time to wind down for bed.

Sydney finally joined me as I was changing into pajamas. She pulled me into a deep, lingering kiss.

"Mmm it's so nice to be home," she sighed. It was definitely not the first time she'd referred to this apartment as home, but it always felt nice to hear it. It really did feel like a home, and the three of us felt like a family.

We got into bed, and immediately our lips and hands found each other, not in the sexy, sloppy, porn-y display of our lunchtime meet-up, but in the slow, sensual familiarity we'd built together. We kissed and nibbled, groped and caressed. Syd's hands sought out my cock, while mine found her ass. We didn't even really bother undressing. She pushed my underwear down, I slid her panties to the side, and I slid inside her.

We didn't need words. With our eyes, our moans, our hands, we could communicate anything we needed. We moved together, slowly, and the pleasure built steadily. Our kisses were frequent and passionate. When I would pull back, Syd's eyes were focused on me, seeing me, into me. It could be scary to be seen so thoroughly. This woman beneath me knew me better than I knew myself. She knew my secrets. Things that could destroy me. But that thought triggered no fear in me. I felt no guilt or anxiety.

Instead I just let the pleasure and intimacy wash over me, and when I came, she was right behind me. Her pussy fluttered around my cock and we rode out the waves of ecstasy together.

As we came down, panting and smiling, Syd looked at me sweetly. "I've missed this."

"Me too."

"Not just the sex, silly." She playfully pushed my shoulder. "I've missed you."

I settled beside her and handed her a tissue from my bedside table. "I know, that's what I meant."

She kissed me sweetly and smiled, before changing the subject. "You're working the early shift on Friday, right?" I got the sense she was anxious to ask me that question.

I nodded. I'd be doing the prep, opening, and manning the slower early hours before a few other bartenders would take over once the proper weekend crowd descended on us.

Syd had a sparkle in her eye. "Think you can keep the late night free?... For us?"

My heart skipped a beat as I considered who "us" might be. I had a feeling I knew. Rather than ask any questions that I knew would be answered with little more than winks and innuendos, I just nodded. "I can do that."

Syd kissed my cheek before cuddling into me. "Good boy."

The excitement I felt kept me awake as Syd fell into her slumber beside me. I wondered if there'd be any sounds through the walls tonight, but as the silence stretched out, I figured Emma may have already fallen asleep, likely after cumming in unison with Syd and I. I remembered Syd talking about how her roommates periods had synchronized soon after they'd moved in together. I had to suppress a laugh when I thought that we were like that, except instead of our periods, our orgasms had become synchronized.

Eventually my mind calmed and I fell asleep beside my slumbering girlfriend.

As the week began, I found myself daydreaming about the two women in my life. When I closed my eyes I'd see Sydney, on her knees, her face partially obscured by my cock as she licked my taint. Or I'd see Emma, the sweet and sultry look in her eyes as she thought about kissing me. Sometimes their faces would swap, and I'd see my sister doing one of the depraved acts my girlfriend and I loved to do together. It had become such a regular feature of my life, being distracted from my day-to-day work with thoughts of these two beautiful women and our ever-evolving relationship. Each approaching weekend felt full of possibility. New experiences to be savored, rules to be bent, lines to be crossed. And this coming weekend in particular felt particularly potent. As if a fuse had been lit, and we were just waiting until Friday for that dancing sparkle to reach the end of the string.

Early in the week, we were all too busy to really talk or even spend much time together. Syd and I realized that on Wednesday night we'd both be free, so we made time to make dinner together and watch a movie. We were cuddled on the couch doing just that when we heard Emma fumbling with the lock, two voices giggling just outside. It had been a little bit since this had last happened, but it certainly wasn't out of the ordinary, so Syd and I didn't feel particularly awkward. However, something seemed a little different this time.

That difference became obvious when the door swung open and two women walked in. Emma's face looked a little flushed, probably a mix of embarrassment and excitement, perhaps a little alcohol. And her friend was stunning. Pale, with striking jet black hair in a pixie cut and dark purple lipstick. Just about every inch of skin we could see below her neck was covered in one tattoo or another of a variety of styles. Some that wouldn't look out of place on a biker. Some artsy graphic designs. At least two cats that looked like they may be current or past pets. One that I recognized as a Tom of Finland illustration, a few leather daddies in an elaborate black-and-white style. She was really showing off her ink, wearing a small white tanktop and loose ripped black jeans that were more tear than fabric. Usually I'd find pants like those ridiculous, but she was making them look both fashionable and sexy. I also took note of her light blue eyes and small, sloped nose. It was impossible not to notice that she looked just like Sydney, if Syd was a smoking hot lesbian.

"Hey guys, this is Kiley." Emma bit her lip and grinned. Kiley waved. "We're just gonna..." Emma pointed at her bedroom and then started to pull her date towards it.

Syd chuckled. "Hi Kiley, nice to meet you!" The girl, with a smoky look in her eye, turned back towards us and smiled before disappearing into Emma's room.

Syd turned to me and raised her eyebrows with a smirk on her face.

I smiled back. "Good for her!" I spoke in a whisper, trying to keep our conversation on this side of the thin walls.

Syd nodded, "Totally! I'm just saying..." She chewed on an idea. I thought I knew what she was thinking, but I wanted to hear her say it. "Don't you think she kinda..."

"Looks like you?" I laughed, and Syd did too, quickly covering her mouth to keep quiet. "Yeah, for sure. It's almost like she's..."

This time it was Syd's turn to finish my sentence. "... Practicing." There was still laughter and joy in Syd's eyes, but now mixed with a little sultry edge. Then she put up her hand. "Look, not everything's about us."

I nodded, but smiled wickedly. "But some things are." Sydney pushed my shoulder and giggled.

We turned our attention back to the movie for a while. We almost forgot Emma and Kiley were here. But of course it was never going to stay that way for long. Not with these walls.

First there was some giggling. The smacking of lips and a few muffled moans. Then a few thuds and the squeaking of the bed.

I looked at Sydney, who was looking at me with a devilish smile. When we turned our attention back to the movie, we both knew it was just a place to put our eyes while we listened to the happenings in Emma's room.

For a while it was just the wet sounds of lips and tongues, punctuated by frequent moans and the occasional creak of the bed beneath them. But, as the often did in that room, the moans eventually began to turn into words.

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"Oh fuck," came the first, the voice clearly Kiley's. Then it was a flurry.

"Shit."

"Yes."

"Fuck!"

"God yes!"

"Just like that."

"Don't stop!"

"Right there."

That was all Kiley. It wasn't hard to suss out that Emma's usually vocal mouth was otherwise occupied.

Syd looked at me again, and the mischievous grin on her face matched my own. I figured she was about to direct us to the bedroom, but instead she reached out with both her hands. Her right hand began fumbling with the button and zipper on my pants, while the other grabbed a blanket that was draped across the far end of the couch.

I quickly realized what she was doing, and I looked back at her, my eyes wide. "Here? They could walk out at any time!" I whispered.

Syd was unconcerned. "They're not going anywhere. Now help me get these off." Her voice was determined, so I knew not to respond, other than to do as I was told. I finished pulling down the zipper and raised my ass enough to pull my pants halfway down my thighs. Simultaneously Syd did the same to her shorts before she draped the blanket over our lower halves.

Not leaving anything to interpretation, Syd grabbed my left hand by the wrist and pulled it under the blanket and between her thighs. I knew what to do from there. I found her clit, already slick with arousal from the show happening through the walls.

She gasped quietly and her eyes locked with mine. Her hand wrapped around my cock and began to stroke slowly.

By the time we found a rhythm, Kiley was grunting out her first orgasm.

"Fuuuuuuck yes, just like that, keep going! Yes... yes, yes, YES!"

I plunged two fingers into Syd and she came nearly in sync with Emma's new friend. I knew how to play with Syd. I knew her triggers. Nibbling on her nipples while she rode me. Spanking her while I plowed her from behind. Hearing me grunt in her ear. And, of course, hearing Emma through the walls.

The sounds slowed as both girls recovered. Syd's pale cheeks were beautifully flushed. Her hand still lazily stroking me. I could faintly hear my sister giggling, I was guessing still from between Kiley's thighs.

It wasn't a long reprieve. Soon the words were flowing again. And our hands were back at it.

"Right there, don't stop!" Apparently Emma and Kiley hadn't yet traded places, because the throaty moans were still from the cute butch girl.

"Fuck!"

Syd slid her palm over the head of my cock, wetting it with my precum and spreading it over my dick.

"Don't stop!"

My fingers began to play with Syd's sensitive clit again, making her shiver and stifle a moan.

"Fucking shit, oh my fucking god." Emma was apparently a fast learner.

Kiley was loud. Very loud. The words flowed and the moans echoed, but soon it was clear she wasn't the only one moaning. I imagined that Emma's tongue was no longer the source of Kiley's pleasure, but more likely Emma's fingers. Once again I could hear the smacking of lips.

"God I taste so fucking good on you."

Syd moaned softly and I felt her body shiver.

"Mmm, you're already close again, huh?" I whispered.

"Uh huh," she replied.

"You wanna go in the room and take care of that?"

She shook her head no, her eyes never leaving mine.

"Trying to get caught?"

She shook her head again. "But this is the next best thing."

"Oh yeah?"

"Uh huh." She bit her lip and then leaned over to whisper in my ear. "You're enjoying this just as much as I am."

I nodded, knowing there was no point denying it.

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"Do you wish you were the one getting her off?"

"I think she sounds pretty satisfied."

Sydney smirked. "You know that's not what I asked."

"Would you want me to?"

Syd nodded.

She rolled her wrist in a way that felt like heaven on my dick. I stifled a moan and rolled my eyes back into my head.

Kiley was headed to another orgasm, her words turning back into wordless grunts. My fingers were a little frantic inside Syd, but it was still enough to have her close. Kiley came first, then Syd. When Syd finally regained her composure, she could tell I was close, too.

She pulled the blanket away and ducked her head down toward my lap, and that was the moment the bedroom door opened.

Syd shot back up, sitting straight as we both grabbed for the blanket to cover us back up. Only once that was done did we turn to look back.

Kiley was standing at the sink, bent down, and drinking straight from the tap. I noticed she was wearing one of my dress shirts (and seemingly only that). She must have found it in Emma's room. Which meant Emma must have stolen one of my shirts. Was she wearing my shirts when I wasn't looking? Was she sleeping in them? The idea made my cock twitch, which Syd seemed to notice.

Kiley finished, stood straight, and let out a loud "ahhhhh." She turned, her long legs crossing over one another, and rested her ass against the countertop. That's when she saw us.

"Oh didn't see you guys were still there." She looked more surprised than concerned. "Could you hear..." She gestured to the bedroom.

"Not at all!" "Only a little..."

Syd and I responded at the same time, both of our already flushed faces getting redder in response.

Kiley just looked at us, her eyebrow raised. Her face was hard to read, but I thought I saw a smirk. "Yeah... sorry if that was... weird. Your sister and all."

I opened my mouth, but all that came out was, "uhh... I mean... it's like..." Nice job, Ben!

Syd cut in. "Don't worry about it." She smiled, and her face communicated a sense of finality.

Kiley nodded, smiling back. I felt like there was an unspoken conversation happening between these two nearly identical girls, and I felt dumb for not understanding it. "Well... I'm going back in there, so... put those earmuffs on..." She pushed away from the counter and turned towards the bedroom before looking back at us, adding "... if you want." Her eyes fluttered between Syd and me, and once again I felt like someone was looking through me with x-rays. She smiled and disappeared back into the bedroom.

When the door closed, I turned back to Syd, my eyes bugging out a little. "Do you think she knows?"

Syd shook her head. "No... knows what?"

That answer wasn't terribly satisfying, but before I could respond, Syd tossed the blanket away and popped up from the couch, her shorts around her glistening thighs. "Come on," she whispered intently.

"Come on what?"

She rolled her eyes. "I came twice, you didn't at all." She said it like she was explaining two plus two. "Let's get some privacy and fix that." The fact that the surprise, fear, and concern of the last few minutes had made my dick go soft didn't seem to deter her in the slightest. She grabbed my arm and pulled. And although I was obviously a little more concerned than her, my girlfriend was trying to convince me to come to the bedroom so she could blow me, and it wasn't like I was going to put up too much of a fight.

By the time Syd had be back in our bedroom, face up on the bed, with my dick down her throat, more moans were coming through the wall. This time it was obviously Emma shouting to the ceiling and Kiley with a mouthful of muff.

The moans got louder, and Sydney's sucking got more intense. When she heard the moans through the wall, she got excited. I was watching her closely and it was like watching her turn on a switch.

"Holy fuck, Kiley, oh my fucking god." Emma sounded like she was having a blast. Emma, an amateur in this realm of sexual experience, was apparently subject to the work of a master.

"FUCK FUCK FUCK FUCK."

"Don't stop!"

"God your fucking tongue!"

That last one apparently inspired Syd, who popped my cock out of her mouth to lick it all over, from the precum gushing head, down to my swollen balls. I couldn't help myself but hiss, "Oh fffff-!" Sydney paused her obscene work to hush me, and I grabbed for a pillow to smother any sounds with, pressing it to my face as I sighed into it.

As Emma worked up to an orgasm next door, Syd doubled down on my cock. She took me back in her mouth, bobbing her head from the tip to the root, eventually adding her hand to pump the bottom half of my cock while she hoovered the top. She knew how to work me like I knew her, and soon I was seeing stars as Emma's orgasmic cries filled my ears. The long build up, the startling interruption, and then the devoted attention from Syd all culminated in me nearly passing out as I struggled to gasp for air through the pillow while filling my girlfriend's throat with cum.

When I knew it was safe, I threw the pillow aside and sucked in air. "Holy shit," I mouthed to Sydney, who performed a little bow before wiping her chin of spit and cum and grinning at me. She crawled up beside me and we fell asleep listening to Emma's second and third orgasms.

That night I saw a lot of faces in my dreams. My friends from high school. My coworkers. My freshman classmates. My parents. And they all looked at me the same way. It was the way Kiley had looked at me after she'd come out of Emma's room. Like she'd figured something out. Like my secret was about to be revealed. The collective gaze of everyone I knew and loved was crippling. Anytime I tried to look away, I'd find myself looking at someone else. My teachers. My boss. My neighbors. All with that searching, untrusting stare. I couldn't escape it.

The next morning I tried to chase away the lingering memory of the dream in the shower. I drowned my thoughts with music as I walked to class. I tried to focus on my morning lecture. But every time I blinked, painted on the inside of my eyelids would be one of those faces. As I worked through a shift at the bar, I found my thoughts overcome with doubts. Was it really worth the risks? What if they found out? Everyone. Anyone. Could I face them?

Another night's sleep didn't help. I didn't have the nightmare again, but when I awoke on Friday morning, those doubts still circled. Before I'd been looking forward to the weekend to come, but now Syd's mysterious plans seemed to loom. A growing pit in my stomach served as a countdown to the evening festivities. While distracted from class I tried to tally the pros versus the cons, as if some kind of amateurish mathematics could solve this conundrum.

At work I imagined what I might say to the girls if I wanted to slow or stop our... whatever you'd call what we were doing. Maybe I'd just say something like *I just can't.* But they'd probably demand an explanation. I could talk about how much I love Sydney and how committed I am, but I think we'd all proven to ourselves that Emma wasn't a threat to that love. In fact she'd only enhanced it. I could just be honest about how worried I am about what our loved ones would think. But then again, who did I love and respect more than these two women?

Usually the rapidly filling bar on a Friday night would be enough to distract me, to pull me away from my thoughts, but I couldn't help but focus on the impending end of my shift. The moment I'd have to make a choice: either to try to unring this bell, to retreat back to the safety of the love of a single woman, a single woman who was not my sister, *or* to dive head first into the uncertain future, where the weight of this decision could hang over me for the rest of my life, a sword of Damocles ready to fall and ruin my life completely. I wondered if I was the first man in history to look at a potential threesome like a lose-lose situation.

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