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Part 1: The Fuck-up

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“Remind me who's going to this thing?"

I can practically feel Jess's eyes roll, my own vision still on the road. “We've definitely talked about this."

“I know, I know," I say, “Just tell me again."

The vixen starts counting on her paws, “Well, there's the six of us. Me, you, Sandra and her BF Max, and then Max's friend Henry, and-"

I glance at Jess. “Henry's going to this thing?! That big deer?"

“Yes dear, that big deer."

“It's just…" I pause, remembering what he looks like. Light tannish fur, too muscular for his own good, and a smile that liquidates women. I shake my head and finally finish my sentence. “...He's big."

Jess snorts loudly into her paw. “Don't get too googly-eyed at him when we do get there."

“Me?" I say, incredulous, “I'm more worried about whichever one of you girls decide to try to pair up with him; he might split you in two."

“Oh please, I'm sure he'll use all that beautiful muscle definition responsibly."

Neglecting my blinker for a couple seconds too long, I take the exit off the highway. “Now who's the googly-eyed one?" I tease.

“Shut up," she says, blushing.

Still smiling, I change the subject. “So who's the last guy then?"

“Uhh… right, so, remember how I said 'we've definitely talked about this' a minute ago? Yeah, well, I don't actually… know." Jess sounds defeated.

“Hm."

“Look, all I know is that Sandra invited us and said Henry and his new girlfriend would be there. It's not like I'm going to want to fuck her anyway."

“You're no fun."

“You're one to talk."

She was right. We were both incredibly, undeniably straight. An incurable curse.

“Well I guess we'll see when we get there, then," I say finally.

Shaking out some nervous energy through my fingertips, I turn the steering wheel sharply and pull onto Sandra's block.

Jess grips one of my car's side handles. “Easy there."

“We're already late," I explain.

“We're not saving any time pulling into their neighborhood like that."

“Relax!" I say.

“You first," Jess quipped. If there was one thing I love most about my girlfriend, it would be how she always put me back in my place. Or her loving acceptance for all my weird quirks. Or her ass. Definitely one of the three.

Taking the final turn onto her driveway, I pull behind two other cars already parked. It looks like everyone was already inside. Max's faded hatchback was naturally up front, seemingly collecting more rust every visit. It was in noticeable contrast to Henry's shiny SUV, a car I had no idea how he was able to afford, but did anyway.

“We were late, remember?" Jess tilting her head toward the front door.

I yank myself out of my own head. “Yeah. Right."

“Knock, knock, knock!" I announce, letting ourselves in. For a small house just out of downtown, I'm impressed how big their space feels. I guess when you throw an orgy, you might be inclined to do a bit of spring cleaning. It smells strongly, albeit pleasantly, of some imagined aerosol fragrance. Max was the first to appear. The lively, curly-haired terrier smiles broadly when he sees us.

“Hey, you made it! We were just about to call you." He gives each of us a hug in turn.

I smile, halfway to embarrassment as I release from his embrace. “Yeah, sorry…"

“All good, friends," he eases. “Well, throw your shoes anywhere. The others are in the kitchen." He walks off.

Jess turns to me. “Ready to have some fun?"

“You know it." I give her a light peck on the lips before we join the others, who I already hear chatting. Even though we were… liberal with who we paired up with, a kiss always felt reserved for the one you went home with. There was some smooching now and again, sure, but for me it usually felt forced. In a weird way, it was more intimate than sex.

We finally got in the same room as everyone else. Sandra greets us first. The black cougar's pleasant expression would normally put me at ease, with her voice like how silk cloth feels. But now her face only turns to confusion when she sees my expression. I'm mortified. Beside Max and Henry is the mystery guest, but she's all too familiar. Way, way, way too familiar.

“David?!" she cries. I can't get a word out. Partly out of shock, partly cause I had no idea what to say.

“Uhh, what?" Max says.

“Yeah, someone want to help us out here?" Henry adds.

Jess manages to maintain some form of dignity for the two of us. “Guys this is his sis -- his sister. Hiii." She waves briefly at her as her voice cracks.

No one speaks for a few seconds, though to me it felt like minutes. But suddenly, no one can shut up.

"Well this is ju-"

"Henry, how the fuck did you guys not-"

"I didn't know!"

"-his sister?!"

"-let this happen, I was so sure I-"

I can't follow all the voices. Overlapping, loud, and some more accusatory than others. I want to cover my ears, close my eyes, and pray to some ancient god of wisdom.

I need an out -- fast. Turning around, I make a break for the door, neglecting my shoes entirely, and collapse on their front steps like a drunk, but my heart still racing. For a strangely detached moment, I feel like I'm a little kid again, struggling to control his emotions.

At least it was quiet in this part of town, something I desperately need. So I focus on the birds, the sound of the occasional car passing through. They calm me down some, but not enough. Inside, I can still hear them all arguing. All except one.

"Hey," she says.

Turning around from my slumped position, I see my sister. "Hey Susan," I say as placidly as I can. No need to act as freaked out as I was.

"Honestly," she says, sitting down next to me, "I had no clue you'd be here."

"Well it's not like I did, either." I blow some air through my lips."God, what a fuck-up."

“It's not that bad."

“Oh yeah? When's the last time you walked in on your sibling about to start an orgy?"

“Well I mean, we could have just started without you. You two did come late, after all."

I internally wince. Maybe externally, too. “Not helping."

A slight smirk reaches her canine lips. “Sorry."

Neither of us say much, so the sounds of birds and far-off cars come back. Inside, I don't hear them arguing now. They probably noticed we slipped out. Thankfully, they knew better than to track us down.

“I should go," I say finally.

“Don't," she blurts.

“What?"

Susan looks conflicted -- rare for her. “No, you don't have to leave. They have an extra bedroom upstairs. We could rotate people between that and the master. We wouldn't even notice the other is there."

It takes me a second to shake my head, feeling gross for even thinking about it. “No way. That'd be... way too weird, sis."

“Look," she says, giving me the same look, the same tone of voice she gave me growing up when I had something she wanted. “Sandra's been trying to do this for fucking ever. I really don't want to ruin her night before it even starts."

“That's her fault for inviting both of us!"

“Don't be hard on her, she didn't know!"

I exhale harshly, rolling my eyes. I want to say “no" again, I really do. But she just had to mention Sandra. God, she was hot. Not bad in bed, either. I loved Jess, but something about that cougar, man...

“I can't make you stay, okay? It would just mean a lot to me -- and Sandra," she adds quickly.

Thinking about how many things wrong there were with this plan, I almost miss her slip of phrase. Practically squinting, I study her face. Susan has a lot of our dad's fur patterns. A white snout bleeding into the brown fur of her cheeks and ears. Her soft brown eyes stood there pleading with an embarrassed smile. She looks surprisingly honest, genuine. I'm going to regret this, aren't I?

I have to look away when I reply. “I guess that could work. Still feelin' pretty weird about this though."

Susan gives a small nod with a blank facial expression I can't read. She sits up and offers me a white and brown-speckled paw, the same coloration as my own. I accept the help and follow her inside.

Part 2: Separation of Variables

---

“And you're okay with this?" Sandra asks me.

“Well, yeah. Mostly. It's not exactly what I had in mind," I start. Jess snorts. “But as long as we don't see each other, I mean…" I scratch the back of my neck without meaning to.

“No way," Jess argued, “We can just reschedule a different night. Maybe when we have two people attending who are related?"

Henry shook his head, but Max spoke first. “No good. This is the only opening in everyone's schedules in weeks. Henry said he'd be busy for most of the rest of the month!" Henry murmurs an agreement.

“What if they both need to go to the bathroom, and then they run into each other naked in the hallway?" What if they hear each other? Or what if it gets out that Susan and David both attended the same fucking orgy?" Jess asks rapid-fire, gradually looking more stressed out with each question.

Sandra answers. “They can call out if we're leaving the room, I guess. And we can keep the doors closed for the noise. Then well," she pauses, thinking.

“What happens at Sandra and Max's, stays here." Henry states, looking at everyone.

“Agreed," Max says.

Me and Susan both nod. All eyes turn to the holdout.

“What?" Sandra asks, clueless. “Oh, of course! This stays here." Her long tail swishes behind her nervously.

“You're sure?" I ask.

“One hundred percent. I know you all think I like to gossip, but I promise. My lips are sealed, no matter what happens."

“Good," my sister responds simply. Everyone looks around, trying to gauge the others' reactions, which had the side effect of no one saying much of anything. The reality of what we were doing was starting to seep in for me. I definitely wasn't about to break the silence first.

Susan, not so much. She suppresses a nervous laugh, looking at the floor. “Well, should we start?" Equally-tense giggles go around our small crowd.

“I call starting with Jess," Max requests. His eyes practically twinkle.

“Oh fuck off!" I laugh, “We always start with our own partners."

“Protective as ever," Jess says.

“Shh."

“I don't know, mixing it up might be fun," Sandra argues, her devilish smile growing rapidly, “What about Susan and I show Henry a good time, first?" Henry chuckles in agreement.

“Works for me," Susan says.

“I'll go grab a towel for the guest room," Sandra says, eyeing Henry like a piece of meat. “Or two," she adds. The stag laughs heartily, following her upstairs, then squeezes her butt when he catches up. Susan follows not far behind, her tail already raised.

Desperately trying to not think about their antics, I turn my eyes back to the terrier. “Guess you get your wish, Max."

He smiles toothily, looking satisfied.

“We get the master bedroom, then. Sweet," my girlfriend says. She takes the lead out of the kitchen, grabbing my paw with hers. Max wastes no time following us.

In spite of the awkward start, I start to warm up to Susan's plan, mentally and otherwise. Jess's expression is looking more lustful by the step, and Max looks like he's having a hard time keeping his pants on. I hardly notice the guest bedroom door creak ahead of us, a cacophony of girlish laughing as it closes, as I start thinking about what things we'd be getting up to.

We walk into our own room right across the hallway. Sandra clearly spent a lot of time getting ready for this weekend. For once, everything was put away. No clothes scattered over the floor, and you can actually see the top of her desk. That same desk had a couple bottles of lube, some snacks and drinks, and a small assortment of toys -- some of which look far too big for any sane person. I think Sandra just had a weird way of showing off. On their bed there's a few plush towels protecting their sheets.

The other two don't take quite as much time to inspect the room. Jess smirks has she helps Max yank off his polo shirt, her own chest already stripped down to her bra. She's already looking more at his crotch than his face.

“Hey!" I call. I tackle Jess in a hug from behind, resting my head on her shoulders. My paws work their way upwards, eventually groping her breasts. “Starting without me?"

“Never," she says. I pull back slightly, just enough to get the latch on her bra. Before it falls to the floor she's already turning around. The rust-red vixen bends over, Max behind her now, and undoes the button on my shorts. It takes till now to notice I'm already rocking a semi. It bulges obviously against my boxers. Jess and Max waste no time with their own pants, while Max, takes is underwear off at the same time. If I was excited, he was fanatical. His canine penis already at full mast, knot and all.

Jess looks at me then back at him, looking equal parts confused and impressed.

“It took us a while to get up here, okay?" he explains.

I laugh it off. “Guess we should move to the bed then!"

“God yes," he sighs. I take the lead, crawling to the front of the large bed and plopping down with a relaxed sigh. Sandra and Max spared no expense on their comfort. Shifting up onto my elbows, I'm able to watch more easily as the vixen joins me. Not wanting to waste any more time, I slip my boxers off with all the grace of someone on a very plush bed could manage. Jess smiles as I struggle, but quickly becomes much more interested in what was underneath those underwear.

“What, not ready to blow like Max is?" Jess teases.

“Hush," he says. I just smile at the two of them.

She rubs the tip of my penis a few times with practiced movements, just enough to elicit a small moan from me. “Come out little guy, time to party!"

I want to argue, but before I can she leans down, butt high in the air, and brings my whole erection into her mouth. So instead, I just sigh happily. Head works wonders on your mental state.

She swirls her tongue against my tip, wet pressure lubing up my dick and quickly bringing me to my full length. No longer able to put it all in her mouth without gagging herself, my favorite fox bobs up and down pleasantly. At first I only notice her wet slurps, when I see Max huffing slightly. He still hasn't joined us. Well, except for casually stroking himself on the edge of the bed.

"Waiting for an invitation?" I ask. Jess looks up at me, her lips still wrapped around my penis. Max is able to respond more easily, but looks like he has a hard time finding the words, his mouth agape. Probably didn't like getting caught being a passive viewer.

"C'mon man, Jess has a beautiful backside, I'd make use of it if I were you."

"Right you are," he says finally. Jess laughs slightly around my cock. The grumbling feels surprisingly nice.

Max gets to work, crawling behind Jess and peeling off her panties to her knees. He looks like he wants to whistle. Instead, he grabs her butt, lowers his head, and, well, I can only guess; the rest of Jess is in the way. But she moans all the same, sending vibrations down my crotch again.

This continues for a short while. I take some time to close my eyes and enjoy the pure pleasure. The vixen cycles between a series of gentle licks and deep mouthfuls. She'll occasionally gasp for air before willingly pushing herself back down. Her persistence always impressed me. What she can't fit in her long maw, she starts rubbing with her digits with gentle strokes and squeezes. Far too soon, I start to feel my knot expand.

Max shifts in front of me, raising his head up and licking his lips. His entire muzzle looks damp. “Well, may I have the honor?" he asks Jess.

The vixen lifts her head too, looking mildly annoyed. “Yes, Max, you may 'have the honor.'"

If he had noticed her tone, he ignores it. “Excellent!" he says. I see him grab his erection in one paw, and her waist with another. Now I could only guess, but I think I see him rub his tip against her vagina a few times, savoring the feeling, before he sinks in, pushing himself into Jess. They both groan as he starts fucking my girlfriend in front of me. I didn't consider myself much of a cuckold, but I was starting to see the appeal lately.

Thankfully, Jess doesn't abandon me yet. As Max starts to speeding up his thrusts, Jess returns her paws to my penis. She goes slower again, rubbing my entire length, licking and mouthing the tip as precum starts dripping out of me.

I pet her head, stroking her gorgeous triangular ears, as she starts bobbing down again. She was starting to get me close, but if I distract myself I usually last a while longer. A double finish was always nice to pull off, but I was starting to doubt my endurance.

Max still pounds away, rocking Jess's body. This starts sending her even further down my cock, almost making her gag. Her lips press against the base of my knot, sending more precum to my tip. But she swallows it all eagerly, god I love her.

I hear heavy breaths from Max as he rutts Jess like longtime lovers. It was honestly pretty impressive how easily he took to it all. No obvious embarrassment as he thrusts noisily in front of me, their sexes squishing against each other -- just him enjoying himself. That man had no shame.

A particularly pleasant swirl of her tongue brings me back. I feel my crotch tighten and my dick throbs slightly. Without meaning to, I moan loudly enough for Max to hear easily.

He looks at me, out of breath. “Getting close too?" he asks. I just nod. Even though I've done this a few times, I can't help but feel a bit embarrassed talking about cumming in front of another dude so openly.

Jess moans heavily, raising her head from my crotch but rubbing my entire length with unrestricted passion. Her spit glistens on my red flesh. She doesn't ask where I wanted to cum -- the answer was always the same. She didn't always swallow for me, but that just made it even better when she did.

The fox lowers her head even more, licking the base of my knot with long strokes and working her way up, filling her maw with erection for what felt like the last time. Her warm tongue messages the bottom of my dick while a paw still squeezes my knot. Max moans through gritted teeth. He trusts in small, close strokes, like he was grinding his knot against her tight lips. The thought did more for me than I wish it did.

“Jess, I'm really close," I huff. She looks up at me again, just pushing her head down further. Guess I was getting lucky -- luckier -- tonight. In front of me, Max pushes heavily into Jess, pressing himself tight against my girlfriend and knotting her.

“Aah!" she grunts around my cock. Her eyes close halfway and roll back slightly, and her ears rest flat against her head -- fucked silly. That did it for me. I sigh, toss my head back, as the first spurt of cum coats the back of her mouth. Jess keeps her head down like I predicted, swallowing repeatedly. My claws dig into the plush fabric, my toes trying to do the same.

But all good things end eventually. My orgasm winds down to drips, Max catches is breath, and Jess lifts herself back up onto her paws. Cum and spit leaves most of my crotch soaked. I shift back to grab a small towel off the nightstand and give Jess some room to breathe.

“Ready to pull out Max?" Jess asks.

“Nope," he mutters.

“Too bad."

He sighs a long, sad sigh. “Alright then, brace yourself." Max grabs her with both paws to her waist and tugs harder and harder till he finally slips out. They both yelp. Globs of Max's cum drip onto the towels below her crotch. I symposized; it was never fun to untie early. But it was even less fun to try and resist the urge when it feels so good in the moment.

Able to relax again, Jess collapses haphazardly. I oogle a bit at her vagina as fluids continued to leak out, then throw the both her and Max a towel.

“You think the others are... finishing their first round too?" Max questions, walking over to Sandra's desk.

“Hard to say for Su-" Jess cuts herself off abruptly. “Yeah, I don't know."

Awkward silence -- no one wants to mention the elephant in the other room. The terrier inspects one of the bottles of lube. “Huh," he says with forced fascination, “strawberry!"

“Look guys," I say, “I think it's weird too, I just didn't want to ruin the night."

“It's not _that _weird," Max claims.

I raise my eyebrows. “Oh? Do you attend lots of orgies with you sister too?"

“No, but then again I don't have a sister."

I scoff.

“I just meant that..." He sighs. “You obviously didn't know. And you handled it pretty well, all things considered."

“I guess," I concede.

“Plus people get up to all sorts of weird stuff at these sorts of things. I wouldn't be surprised if incest wasn't on some partyer's fetish lists, calling each other 'daddy' and the like."

Blinking twice, I shake my head. “Are you suggesting…?"

“No! No, no, no, of course not. Just trying to help."

Jess suppresses a laugh. “Sounds like you just did the opposite."

“Eh, I get what he's saying," I reply, though I was starting to doubt that I did. Did people really seek out family members for these things? A roleplay might be kind of fun, but the real thing sounds insane.

Remember how I said I was trying not to think about what was happening across the hall? Well, now I can't stop myself from picturing it in detail: my sister naked, getting railed by Henry. Probably french kissing Sandra at the same time. God no, stop it brain! Unfortunately, penis also missed a memo.

Max practically notices before I do, stealing a low glance at me. “Already ready for round two I see."

I feel my face heat up immediately, but I try to take his lead. “Yeah, yeah, you caught me."

“I'll go see how the other three are looking," he says, still very au naturale as he leaves.

I can see the gears turning in Jess's mind. As soon as Max was out of sight, she says “So why did you pop a boner right after we finished talking about incest?"

“Oh, screw you!" I laugh.

“I'm serious!"

I struggle to come up with a lie in time, which is always a bad look when you're about to lie. Jess's eyes go round. “I-I can't control this thing, okay?" I offer weakly.

Jess catches the act quickly. She smiles knowingly. “Mmm-hmm. Sure."

“Why is everyone acting like I wanna fuck my sister tonight?!"

“So you're saying you don't."

I pause to shake my head. “No!"

The vixen points a black-furred finger at me, smiling. “You just hesitated."

Frustrated, I throw my head back in a loud groan, then keep going back until I fall back onto the bed.

“You can be honest with me, you know. I'm not going to tell anyone."

She's pushing all my buttons. The worst part is is that she was right about one thing, she could keep a secret very reliably. “I… don't know. Honestly it freaks me out that I even _might _like it in concept. What about you?" I ask.

“Not really," she says, “But I kind of get the appeal -- forbidden fruit or whatever. Just can't get into it myself."

“Hmm," I say, deep in thought. Introspective thought wasn't my specialty, but here I was, thinking about whether I was sexually attracted to my sister.

One thing was for sure though, my erection wasn't going away.

“What's keeping Max?" I say.

“Don't know," she says, stealing a glance down at my crotch again, “Don't care."

The fox runs a thumb down my length from tip to sheath, then gently playing with my balls. “Why's that?" I ask, distracted.

“Don't play dumb."

“I'm not!"

“Then get over here, dummy." She grabs my paw and pulls me on top of her. I move in a hurry. Dropping close, I kiss her, inhaling her sweet, familiar scent. My dick prods her crotch, so close to the mark. I find her lips, kissing her with sloppy intensity. No more waiting, except --

“Hey wait, grab a pillow," Jess requests.

Pulled from the moment, I sigh before agreeing. But it doesn't take us long to wiggle a pillow under her fluffy ass. Soon I'm looking down, spreading her fine vaginal lips with the tip of my tapered penis. Her thick tail wags with excitement below me. I notice how wet she is, still with globs of white cum undoubtedly coating her passage from her earlier rendezvous with Max. Sloppy seconds, but I don't care. Slowly, I grind inside her over several gentle thrusts, her walls sliding tight against me, when I hear the door.

“Sup guys!" Henry calls. I turn to watch Sandra follow in after him. Neither of them wore a thing.

Jess pops her head up. “Oh, you know."

“Hmm," Sandra says, “Suppose we do. You guys are sooo cute together."

“Don't let this one get away from you, David," Henry adds.

My thrusts falter, distracted. “Are you two just going to watch then?" I snap. They meant well, but I was totally out of it again. I roll off Jess, defeated.

“Oh sorry, we didn't mean to kill the mood," Sandra apologizes.

I let them off. “It's alright."

Jess wastes no time trying to get back into it. “Should we pair off then?" she asks.

“What, or uh, who did you have in mind?" Henry asks in turn.

“You," she says, smiling at the stag. Henry returns one of his famous, women-liquidating smiles. I can't help but roll my eyes. The cougar catches my sour expression immediately.

“Oh, let them have their fun, Dave," she says, approaching me on the bed. “And we… can have ours." She's as slow and thoughtful with her words as she was with her movements. But despite that, she's on top of me before I can keep up. I can hear purring deep in her throat. Her tail is raised, her eyes steadying me. With our gazes locked, she massages my penis up and down in her paw, rubbing my fluids into her fur.

“You're a messy guy, tonight," she comments. I chuckle. “Hate to say it," she continues, “but it might get worse before it gets better."

“Shame," I say. It's her turn to laugh now. Dropping my erection, she straddles me, her head close to mine. She leans in close, about to kiss me. I strain to move my lips to meet her, whiskers grazing my muzzle, but she back at the last second, a teasing smile on her face. She loves to keep me in suspense.

Instead, Sandra aligns her vaginal lips to the tip of my penis. She misses her mark the first time, rubbing her arousal, and what can only be some of Henry's cum, against me. Maybe it was intentional, being so painfully close to the mark. If I wasn't so turned on, I would have asked her to press herself on top of me again and sandwich my dick against her warmth, keep building the suspense. But she readjusts wordlessly, and soon my tip parts her slick tunnel as she lowers herself onto my crotch. My whole body shudders. I feel her labia pulled tighter and tighter around me as she reaches the base of my knot, grinding against it. I feel her fluids and warm cum squish around my member.

The cougar moans out my name in that way of hers. She sounds urgent. Shifting again, she moves low enough to let her hips do all the work. I grab her waist instinctively, not wanting to let go of the sensation. Every time she sinks down, she gains enthusiasm, humping me faster, sometimes slowing with me deep inside her squeezing walls.

“Don't stop," I tell her, looking up.

“Never," she breathes.

Across from us I finally notice that Jess and Henry are up to no good. The vixen cries out as Henry pounds into her from on top, pushing her legs up to her ears with two heavy paws. He grunts repeatedly, pushing into every stroke. It almost looks too rough, but Jess's face mirrored mine in pleasure, not with pain.

My focus went back to Sandra as my knot starts slipping inside her, just before she wiggles her butt back up. I bite back a curse, so devilishly close to relief. But Sandra keeps going, moving her hips in a tight circle against me so I stay in deep. Her pussy tenses against me, begging me to coat her walls in a second dose of cum.

I held on for just the right moment, but thankfully I didn't have to wait long. Just when Sandra begins pushing lower again, I thrust up just slightly. With only a subtle movement, she sinks down all the way, my knot buried inside. She grips around all sides of me, labia bulging around my knot.

“Ohhh fuck," she moans. Then I feel it: her orgasm contracts her passage rhythmically against me just before I reach climax. Sandra gasps, arching her back and her thighs gripping me. Her claws dig into my thick chest fur. I feel cum erupt out of me. My legs tense up under her gorgeous body when I try to press in deeper. I groan out, my seed stuffing her. She wiggles on my lap, intensifying my orgasm. Before long I'm spent, my last drips filling what little room it feels like is left. Some leaks out, soaking the white crotch fur around my balls even more. The cougar kept her promise.

Sandra falls the rest of the way on top of me, using my chest and shoulder as a headrest as we lie tied together. We both have to catch our breaths.

My attention turns again to Jess, who was still getting slammed into relentlessly. My dick flexes inside Sandra at the sight of them.

“That man is an animal," Sandra mumbles. She had turned her head on my chest to look at them too.

Even though I agree, I have trouble voicing it. “Yup," I say eventually. Max was just as eager, if not more, but burned out much more quickly. Henry was unstoppable, sometimes to a fault.

“At least Max didn't look like she was going to break her. Where is he anyway?"

“With your sister," she says casually, like she's telling me they were just hanging out. I grumble somewhat aggressively.

“Was that jealousy I hear, Dave?"

"What? No!" I cry. If I wasn't so embarrassed, I would have added: and stop calling me Dave.

She hardly relents. “You two have a very interesting dynamic. She's so crafty, secretive. While you... you're an open book. It's probably a bit mean to mention this so soon, but you should have seen how flustered you got when you saw her here."

I don't know what to say to this, wishing I could get away. But her eyes drag me back

.

“Wanna know a secret?" she says, smiling deviously. She brings her lips to my ear. “Susan knew you were coming."

“What!?" I blurt out. Jess turns toward me briefly, just before Henry grunts and hilts himself inside her, presumably cumming, and she disregards me completely.

Sandra still just smiles at me, runs a pair of fingers across her lips, and says “you didn't hear it from me!"

The world fades away. I don't feel Sandra's weight on top of me any more, or hear Henry's ragged breaths. I just feel confused, like nothing makes sense. But bit by bit, everything does. Why Susan worked so hard to keep me here. Why she had that blank expression when I finally agreed. Why Sandra supposedly never made the connection we were related.

What I don't get is why they did all this, why they put in the effort. Well, I know what a small, horny part of me is saying, but I bury that thought as best I can and shake my head. The world comes back, Susan's weight is on top of me again. She's looking at me.

“Get up please," I say firmly. A plan's starting to form in my head.

“What?" she asks.

“Sandra. Please."

“Fine, fine." She pulls herself up, tugging against my knot, and pops off. Pain sears through me, but my mind is on Susan. Before I walk out of the room, I have enough sense to wipe of the cum and arousal dripping off of me, but not enough to put on pants.

“Where is he going?" I hear Jess ask. I don't bother to reply. I close the door behind me, take two steps, and open the guest bedroom.

Part 3: Sista, Sista!

---

Just as Sandra had said, Susan and Max are inside. They are naked and chatting casually, eating some sort of crunchy snack mix. A pawful of it falls out of Max's grip, another piece from his open mouth.

“Max, could you give us a minute?"

“I uhh, well what is this all…?" he starts asking. I give him a hard look. His resolve falls apart in front of my eyes. “Yeah! Nooo problemo." In seconds, he hurries out of the room. Not breaking eye contact with my sister now, I close the door behind him. Susan tries to say something, but I interrupt her immediately.

“What was the plan here, Susan? Act all embarrassed when I show up and freak me out? Make me look stupid?" I start walking closer to her as I talk.

“No!" she denies.

“Then why do it? I thought things were going good between us for the first time in years. Why do _this _in front of everyone?" My arms gesture widely at our surroundings.

“They were! They are!" she cries. Susan's standing up now, meeting me at the side of the bed. She looks tiny, holding her arms in and looking straight down.

“Then why?" I plead.

“Because," she says, on the verge of tears. We're standing inches apart now. “Because, you're not just a brother to me any more. Because I -- I love y-"

I interrupt her with my lips firm to hers. A surprised second later, she's kissing me back. My paws find her neck and I tilt my head, kissing her more deeply. She's pressing her body to mine, wrapping her arms around me. I'm wagging my tail. Everything's happening so fast I can hardly keep up.

Finally, I break away. Neither of us say anything. We both know this is a bad idea, that we shouldn't so much as see the other naked, that the others would figure out what was happening, but I stop caring. Maybe nothing made sense, but I didn't want it to. I don't want to think, I want to do.

So we say nothing. I see her eye the bed, and follow her onto it in seconds. She sits down on a pillow and spreads her legs slightly. Milky liquid clings to her glistening vaginal lips and leaks from inside. I'm drawn in. My paws wander down her legs, her thighs, then her butt. I can smell the old sex, the combined work of Henry, then Max. I stop sniffing my sister and start licking.

Pornos all seem to make girls talk about how they like the taste of cum, that it's somehow pleasant. But it's not, at least to me. The pleasant part is your brain not caring and you doing it anyway. Because you're aroused. So when I tasted Susan, I didn't care I was licking up old cum, I just cared that I was getting my sister off.

She squirms underneath me when I probe her vagina for the first time, sucking and licking her clit. She caresses my face with her paws, looking down at me as I work. She moans when I relent and lick more gently, teasing her thighs with my tongue and rubbing her legs and lower torso with my paws. My face is getting wet, so I rub myself against her leg to dry off. The short fur near her crotch feels like velvet.

When I start licking her mound, she sighs and tells me not to stop again. My broad tongue swipes her slit in long strokes. Thoughtless minutes pass like this. I feel her thighs grip the side of my face, a sure sign she was getting close now. My sibling squirms, bucking her hips up and panting, moaning, her sex twitching.

Somewhere in there, I got my erection back. I'm so hard that I'm aching to be touched. But she won't let me go. I eat her out in sloppy circles around her clit, pressed tight to her. Fresh arousal streams out of her and onto my tongue, tasting a whole lot better than old cum. I'm teasing her body for more when she releases my head from her thighs. Susan sighs happily between deep breaths.

“Damn," she praises. I sit up on my knees, wiping my sore jaw off with a paw. “Want me to get you, too?"

I take one look at her. “Yes and no," I say, not elaborating. Instead, I crawl on top of her, and lean in to kiss her. She probably figured out what I meant when my dick slapped against her crotch. We kiss urgently, like we had to make up for lost time all those years growing up, messing with each other. I pull away gasping, then grab my dick to position it. But I hesitate. The rational part of my brain is throwing a fit.

“David, don't make me beg."

“Are we making a mistake?" I ask. I lie perched above her, my dick one push from the forbidden.

Those intelligent brown eyes analyze me. She grabs my butt firmly in her paws. “Yes," she confirms, before pulling my body closer to hers. I spread her easily. My tapered length is bathed in warm, eager flesh that almost overwhelms me. When I feel the bulb of my knot on her lips, I finally stop my slow thrust. I had forgotten to exhale for a few seconds; I almost have to catch my breath again. It feels like every part of my sibling's passage fits against me perfectly, our bodies linked. Susan brings her paws up to my face, petting my cheek. I can hardly believe I'm doing this.

Eventually, I realize I haven't been moving, and force myself to continue. When I pull out, her vagina grips me every inch of the way, demanding I sink in again. So in long strokes, I try to.

But my nerves are finally starting to get to me. I struggle to keep a consistent pace. After one thrust in too fast for comfort, I falter completely, hyperventilating.

“Hey," Susan says. I'm staring at her chest blankly, trying to clear my head. “Hey, look at me!" she commands more sharply.

I do. Her expression softens immediately. I relax a bit, thankful she's not about tease me like in our younger days. “You want this right?" she asks.

“Yes."

“Then you'll be okay. Come here." She holds out her paws, motioning for me to rest on top of her. My dick slipping out of her and resting against her sex, I lower down, putting most of my weight onto her chest. She exhales harshly as we hug.

“Hoo, you're heavier than you look. New plan: roll over?" she suggests. I nod.

With her on top of me instead, I rest in her embrace. I distract myself and try to think of something to ask Susan. “So when did you stop hating me and start liking me?" I ask.

“I never hated you! Well, okay, maybe I didn't like you when you were still my little brat of a brother. But for the past few years, I don't know…" she pauses before finds her words again. “After I moved out, I went from not being able to stand you to somehow missing you. Whenever you called to check up on me, that was usually the highlight of my day. At first I thought I was just homesick, but I always just missed you. I was..."

“Confused?" I offer.

“Yeah." My sister falls off me, curling up against my naked body. “And you try telling your brother you're falling for them when he's been with a fox for three years.

“Fuck," I groan, “Jess is gonna kill me. What are we even doing!" I sit up on the bed, tense.

“We're having fun," she responds, “at a swinger's party. I'm not asking you to break up with her."

“It can't be that simple."

“It can at least _start _there. We don't have to get all mushy with each other."

“What would that even make us though? Siblings with benefits?"

Susan erupts in laughter, crying into my shoulder. I can't help but smirk.

It takes her a minute to recover. “Yeah, something like that," she agrees. “So are you good?"

I had almost forgotten how freaked out I had gotten. “Yeah, I think I am."

“Think?" she quotes.

“Know. Now get your butt over here," I say.

She complies, her paws gripping the blanket and her legs spread. “That's no way to speak to your sister, David."

My erection throbs, instantly turned on again. “I'll have to make it up to you," I say.

“Please do."

On top of her again, I take less time to adjust, and thrust in. Her walls grip me again, but I feel calm. I can focus, working myself in and out like I do with Jess.

But this isn't Jess. My sister moans seductively, wrapping her legs around my waist. Occasionally, I hear her tail thump against the bed. I see the girl with the same brown and white fur as mine, who has known me for as long as anyone, in a context I was never supposed to. Every time I sink in, her vagina squishes around me, so incredibly wet. Her heat spreads through my body, making me breathe deep. Our paws find each other, interlocking. Her fingers squeeze mine when she tries to raise her hips to meet my thrusts and slide in deeper. It feels so good to be wrong.

Strings of old cum coat our crotches. My dick slides in and out of her cunt like I used too much lube. It felt dirty in the best way possible, sharing my sister with two others...

“Fuck," I groan at the thought. The third orgasm of the night was starting to build with its slow intensity. There was no massive, arching cumshot by number three, no pumping your girl full of white. Just that slow pressure, until it overpowered you. In the end, it felt just as debilitating; you can't move.

But for now, I was still building. I try sliding out slowly and sinking in rapidly. Fluids splatter our fur and the doused towel.

It was exhausting. So I slow down again, pressing in deep and grinding myself against her opening. Susan moans in earnest. “Just like that," she says. My lips find her neck, kissing her. I concentrate on rocking my hips shamelessly. Every short thrust brings my knot further inside my sister, her boobs jiggling slightly, and my orgasm closer. Our bodies didn't care we were related, her walls coaxed me all the same.

But hers arrives first. Her arms and legs squeeze all sides of me as she releases. Her whole body shudders, contracting around my penis. I desperately wanted to knot her, but she's too tight now. Every part of me right up to my tip feels kneaded in her spasming tunnel. So I wait, thrusting harshly and grinding relentlessly, till finally her body starts to accept her brother's.

“Knot me, David!" she begs.

Her cunt pulls painfully tight, then finally slips around me, taking my knot.

I gasp.

A mix of fluids squishes out of her. She's too warm. The pressure inside me reaches its peak, making me release still more cum into my sister's soaking pussy.

Exhale.

Pressed in deep, my tip is swimming in it. My balls, matted with cum, rest against her crotch, tense and pulsing as I unload, breeding my sister. She squirms and grinds below me, milking what little I have left to give. It takes a moment to recover.

Her wagging tail tickles my backside. “Was your brother a good fuck?" I tease.

“Shut up," she groans.

Not satisfied, I lick her cheek like an over-excited feral. “Hmm?" I ask repeatedly, between licks.

Susan starts giggling. “Fine, fine, you were okay! Now stop it!"

I stop my assault, satisfied. My knot still pressed in deep, I savor the sensation of my older sister around my cock. I get ready to pull up.

“Oh no, don't pull out!" she commands, “I love this part."

“If you insist," I say.

Trying not to put all my weight on top of her like earlier, I get comfortable in her radiating heat.

Many cozy minutes pass, talking about nothing in particular. By the time I feel my knot start to deflate, I hardly notice how long its been.

I pull out, cum oozing from her flooded pussy. Dabbing my crotch off on a towel, I stand up, suddenly very thirsty. We were going at it a long time.

“What do you think the others are thinking at this point?"

“You mean besides 'since when did David want to do his sister?' I don't know, probably thinking about leaving."

I feel for my phone, before realizing I'm butt naked and my stuff is in the other room.

“What time is it?" I ask.

She checks. “About 11."

“Shit, I work tomorrow."

“Better get dressed, fluffy boy."

Oh great, that nickname. I hurry out of the room, surprised to find no one in the master bedroom and my clothes in a tidy pile. “Thanks, Jess," I mutter to myself.

Part 4: Departure

---

When me and Susan finally meet the others in the kitchen, everyone's already talking about leaving. Shockingly, no one says much to either of us. I didn't know why, but for now, I was willing to just accept it.

We say our goodbyes, some more awkward than others:

I only say a word or two to Sandra. I'm having a hard time getting over how she revealed how my sister ended up here.

Max seems over it already, giving me the same, over-eager hug he gave me when I got here.

Henry tries to act nonchalant, but fails. I've never seen the deer look so uncomfortable. Somehow, I manage to enjoy that.

Before we leave, Susan gives a long hug that I barely manage to escape. She whispers that she looks forward to next time.

I hold the door for Jess and get in on the driver's side, and with one more wary glance at my sister, I take off.

My and Jess don't say anything to each other till we reach the end of their block.

“Sorry I'm such a-"

“I can't believe you did that!" she interrupts.

Feeling especially small, my ears fall back, ready for a wave of verbal abuse.

She's smiling for some reason. “You fucked your sister, and didn't even invite me to watch! Dick!"

I sigh through a shaky laugh. “Ooooooh, fuck you."

“No, fuck you!" she returns sarcastically, “that was so…. kinky! You're never that kinky!"

My laughter builds, but my worries don't go away completely. I still had to tell her how Susan felt about me. Not to mention how I felt about her, once I figured that out.

But for now, I was just happy where I was, riding down an empty highway at night with my girlfriend, to an apartment neither of us hate completely, probably to swap stories of our times at Sandra and Max's, to eat unhealthy food in front of the TV, and to pass out once we make it, just barely, to bed, utterly spent.

Yeah, I think that would work.