My Sister is a Porn Star

by dirty little secret

Rating: mature
Tags: Original Character, Porn, Other, Sex, Lightning Dust, My Little Pony: Friendship is Magic, Anthro
Length: 8449

Pixie Dust gets caught watching a porn video of his sister Lightning Dust and her friend Firefly. Lightning enlists her friend's help in finally popping her little brother's cherry.

Pixie Dust’s sister Lightning Dust is a pornstar now. They don’t talk about that much. But he meets her hot friends sometimes, and then usually ends up finding them online later. One day, though, one of those hot friends -- Firefly -- catches him watching a video of her and Lightning Dust together...

Cover image adapted from 341789 (artist unknown) and 1274848 (by bbmbbf) on derpibooru.
Contains: incest, loss of virginity, casual sex, impregnation teasing, and a bit of porn logic

Published 2019-06-04 18:20:01 UTC
Last updated 2019-06-04 18:20:01 UTC

My Sister is a Porn Star

I made my way home in a sour funk, the kind of mood that made me want to cross my arms over my chest and glare at anypony who smiled at me. If I'd thought the way other ponies made fun of my name in school had been bad, it was ten times worse now that I'd graduated and moved on to working with the weather patrol. I mean, come on, 'Pixie Dust' isn't that bad of a name! Some of the other rookie members had much stupider names, and nopony made fun of them.

At some deep level, I knew it was because I was kind of shy, because I never spoke up for myself ... and because I was a virgin. They'd somehow known that, from day one, and it only fueled their raucous jokes about me being gay. Between that and the name Pixie Dust, they all thought they had me figured out. It wasn't my fault I wasn't as big and muscular as most stallions my age, or that mares were just ... really hard to talk to.

For most of the way home, I managed to keep from crossing my arms over my chest and scowling. Not only was that off-putting to everypony else in Hoofington, I knew from experience that it wouldn't make me feel better. I couldn't really keep my fists from clenching, though, so I hid them in the pockets of my hoodie.

I'd thought that I'd be able to get a little peace and me-time when I got home – my sister slash roommate, Lightning Dust, should have been out on yet another one of the 'modeling' jobs she'd been taking after washing out of the Wonderbolts and then washing out of her knockoff washouts group. It was obvious what those modeling jobs really were, but I couldn't complain, since they paid the lion's share of our rent.

But she wasn't gone when I came in the door – she was right there in the middle of the living room, swapping flying stories – more than half made-up, probably – with one of her 'friends from work', a spunky-looking pink mare with a shockingly blue mane and tail.

Lighting must have seen the unguarded reaction on my face when I came in. “Oh come on,” she said. “Don't look at me like that. I live here too, you know.”

I threw my empty lunchbox onto the kitchen counter with more force than necessary as I stomped by. As if this day wasn't bad enough, now my me time would have to be on silent mode. And my door didn't even have a lock on it, so I'd always be checking over my shoulder, just in case, which always ruined the mood. “I thought you had a gig today.”

Lightning waved my words away as if they were an annoying fly. “Cameraman called in sick, so I figured I'd spend the day with a flyer almost as good as I am, instead.” The other mare punched her arm, which Lighting didn't seem to even notice.

I kept on going. I was almost there, almost at the door to my room, and once there, I could do my best to pretend nothing outside of it existed ... at least until sunrise tomorrow, then the same routine all over again.

“Her name's Firefly,” Lighting all but shouted. “You remember her, right? And she's a really cool mare, if you wanted to, I don't know, be sociable for a change and maybe get to know her.”

I paused, my hand on the doorknob, and glanced back at the two mares. 'Get to know her'? The way my sister had said that ... what was she trying to imply there? She couldn't possibly be talking about ... that kind of 'knowing her'. I gave Firefly another glance. She was built almost exactly like my sister: tall, athletic, and yet inexplicably bountiful around the chest. They were even both wearing basically the same black running shorts and athletic tops that were little more than sports bras. Probably the costume from their canceled gig. Yeah, Firefly was definitely another one of those 'models' my sister had been working with lately. A pornstar, to say it bluntly. And like any good pornstar would be, she was obviously way out of my league.

Not that I really had a league, did I? I never got a second look even from the homliest mares my age. Not that there even were many mares on the weather squad. Maybe I'd forever missed my opportunity to have a 'league' by being shy in school.

Well, I sure wasn't going to let Lightning tease me about it all evening after the guys at work had teased me about it all day! With a roll of my eyes and a groan, I flung open my bedroom door, stomped through it, and slammed it behind me.

I really wished it had a lock. It would have been so satisfying to snap the lock shut and close the rest of the world away. Maybe I could call in sick tomorrow. I wasn't sure how much more of this I could take.

I very nearly ended up flinging myself on the bed and sulking ... but from my desk, my laptop was calling my name.

'Firefly', huh? I licked my lips as I sat down and turned on the old computer. She might be completely out of my league in real life, but there was one place where nopony was out of my league. And thanks to knowing that Firefly worked with my sister, I knew I'd find her there as well.

The name of that magical place? PoneHub.

I barely had to type it in. Only the first letter, and it already autocompleted for me. My computer knew me so well. I was immediately bombarded by dozens of intriguing video choices ... but I was looking for something very specific today. And all I had to do was type 'Firefly' in the search bar.

The very first result – and the only result that actually matched what I'd typed in – had a picture of that very same pink and blue mare, topless except for a pale green hand groping her breast, next to a title reading: 'Hardcore Lesbian Wing-licking Gym Bunnies!'

Well, wing-licking was hardly my fetish of choice – it just seemed stupid to me – but there was bound to be plenty of other lesbian action going on and, most importantly, that Firefly, without any clothes.

Unfortunately, in the heat of the moment, I'd forgotten to turn off the volume, so as soon as I opened up the video, I was greeted by a mare's voice in full-on porno screaming. Instantly, I hit the mute button. Then I waited, looking over my shoulder with my hand hovering over the laptop's lid, ready to slam it closed at the first hint of my door opening.

But the door didn't open, and the slight sounds of conversation outside went on like normal.

Phew. Close one.

Okay, back to business... In this part of the video, Firefly was lasciviously licking the primary feathers of a pale green wing, and definitely taking her time with it. She even still had her clothes on. They were sexy gym clothes, sure, but if I wanted to see Firefly with her clothes on, I could just go back into the living room.

I skipped ahead a few minutes in the video, and there – pay dirt! In all the glory of grainy, low-framerate footage – I sure wasn't paying for PoneHub premium! – Firefly crossed her arms in front of her chest, grabbing onto the bottom of the sports bra thing and pulling it upward. My eyes opened wide as her big pink tits popped out, one after the other. Woah! Yeah, she was way out of my league – just look at those perfect round boobs and dainty pink nipples. Really a ten out of ten, and not the kind of mare who'd ever stoop so low as to consider going out with me.

And then that pale green hand came into the frame, groping Firefly's breast just like in the preview image. I reached for the button of my pants, unhooked it, and went for the zipper ... and then I froze, zipper in hand, as the rest of that pale green mare came into the shot. She was unmistakably, unequivocally, Lightning Dust. My sister.

Oh, I knew my sister had some videos on PoneHub. I usually tried to avoid them. Especially when Lighting Dust was home. Yeah, I'd watched some of them – anypony in my position would. I got curious, okay? At least, anypony would who had a sister as hot as Lightning Dust. She was every bit the match of Firefly in the looks department. Maybe a bit smaller in the chest, but she more than made up for it with that firm, athletic ass of hers.

And in this point off the video, Lighting Dust was already completely nude. As she went in close to suck on Firefly's other nipple, the camera panned down and focused on my sister's bare ass, finally coming to rest on her dripping-wet pussy nestled between those firm round ass cheeks.

Okay ... just this once. If Lighting hadn't walked in when that first blast of sound happened, she wasn't likely to walk in at all, was she? I unzipped my pants the rest of the way down.

Things were really starting to heat up now. I really started to get into my rhythm as the grainy picture of my sister slowly pulled Firefly's shorts down, revealing that the pink mare wasn't wearing anything at all underneath them. Ugh! It wasn't fair that a mare with a body like hers should also have such a perfect, cute pussy! She was going to make me cum before they even got to the good part!

In some back part of my mind, I was already thinking about how I'd save this video to my favorites and come back to it again and again. Between that and the huge amount of concentration I was paying to certain other activities, I took no notice at all of the ever-so-quiet click behind me, nor of the slight swish of my door brushing over the carpet.

Oh yeah, now this was the good part! Lightning and Firefly were sixty-nining on top of a weight bench, both of them tongue-deep in the other's snatch. I used both hands now, leaning back in my chair as my cock started to flare.

And as I leaned back, I saw ... Lightning Dust and Firefly, standing right behind me, both of them covering their mouths as they tried to hold in laughter.

The bottom fell out of my world. For a long moment – far too long – I didn’t even know how to respond. I just sat there, my cock in my hands, staring up at the two mares who had somehow come out of the computer screen and were now standing behind me...

Eventually, my brain came out of 'me time' mode long enough for me to realize what actually happened. Not only had my sister caught me masturbating, not only had she brought her friend with her, she'd caught me masturbating to a video of her and her friend! With a gasp and a sudden lurch, I tried to shove my engorged cock back into my pants, cover myself, and close the laptop lid all at once.

My clumsy efforts were wildly unsuccessful. After some awkward fumblings and one very loud curse, I ended up on top of my tipped-over chair, cock in one hand, remains of my computer screen in the other, and one leg on top of my desk somehow. I stared up at the two mares, wincing as they were no longer able to contain their laughter. Both of them broke out into blatant snorts and giggles.

With jerky, unsure movements, I struggled to disentangle myself from my own furniture. The laptop screen was ruined ... but at least it wasn't showing that incriminating video anymore. Not that it mattered. They'd already seen enough to know what video it was, and they'd made that video – they knew what it was about better than I did.

I was busted, absolutely busted, and there was no way around it. That morose knowledge was at least enough to overcome my nerves. In a slow daze, I calmly picked myself up, tucked my cock under my shirt, and buttoned my pants over it. At least I would face my fate with the semblance of dignity ... kind of. The slowly wilting hard-on visible through the fabric of my shirt didn't help with that, but what else could I do?

Full of sullen dread, I turned toward my sister and her friend, staring at their hooves. Fine. They'd caught me. Whatever they were going to say, I'd take it. I probably deserved it. Ponyfeathers – how did I become such a loser?

“So,” Firefly said, surprising me by being the first to say something, “you think your sister's hot, huh?”

My head jerked up. I took a step back. That was not what I had been expecting, and I had no idea how to answer it. “I... I, um...” Should I say yes and have them think I was a creepy pervert? Should I say no and insult her? Which was better? Which was worse?

“Relax, kid.” Firefly laughed again. “Of course Lightning's hot. Otherwise, she wouldn't be working with Moneyshot and his 'modeling agency' with me! Heck, you should see my sister.” She closed her eyes for a moment and bit her lip slightly. “She's hot enough to be a real model, and you can bet I've wished I could watch videos of her a time or two.”

I rubbed the back of my neck, trying to look at something else, anything other than looking at my sister and subconsciously judging how hot she was. I was moderately successful, if only because Firefly was just as much of a joy to look at.

Firefly giggled again. “So, you crank it to videos of your sister often, or is this a special occasion?”

My cheeks burned. Why was it that out of this whole situation it was that question that lit up my blush? “I... I never, um...” One look at Firefly's incredulous gaze tore the lie right off my lips, and all that was left was the truth. “Not very often.”

Lightning came up and poked me in the chest with one finger, which almost knocked me over. “Oh come on, dweeb. Lighten up. I've got thousands of stallions jerking off to me every day. I think I can handle one more.”

“I... You know I don't like it when you call me that.” I looked away from her, forcing myself to tear my eyes off of her body. Those workout clothes sure didn’t hide much. And now I knew exactly what was underneath them.

She huffed. “I'll stop calling you a dweeb when you finally get laid.” There was a pause. She seemed to expect a response to that, but I didn't give one. Eventually, she went right along with what she was going to say anyway. “You know, I invited Firefly over because I was trying to set you up with her, but you sure don't make it easy!”

“But she's...” How could I say it? How could I tell my sister that her friend was way out of my league?

“You know,” Firefly added, oh-so-helpfully, “If he actually got his dick wet every once in a while, he probably wouldn't be so fixated on you, Lightning.”

“Hey! I'm not...” I couldn’t even force myself to finish the sentence. Maybe I was fixated on my sister. Ugh – I was a loser and a pervert. And if the guys at work were right about that, what else were they right about? Could I actually be gay?

Firefly stepped closer to me in my moment of introspection, very close. Nearly touching me. Instead of staring down at the floor now, I was staring down at the little bit of pink cleavage that managed to escape Firefly's black sports top. “You know,” she said, faux contemplatively, “there's a chance that I could actually help with that.”

My eyes shot up to look at hers.

She looked back at me, her own eyes seductively half-lidded. She licked her lips in a way that she must have known would make stallions scream for her. “We both got a pretty good look at that cock of yours a minute ago, and I've got to say, you took me by surprise. Never expected a skinny kid like you to be packing something like that.”

“It's ... what?” My cock was rising again, as if it had been called by name, swelling inside my shirt where both of them could no doubt see it.

“Oh, it's fantastic,” Firefly said. “Isn't that right, Lightning?”

My sister was smiling again now ... that was usually a bad sign. She was starting to get in on their little joke. “Oh yeah. Firefly and I have seen lots of stallion cocks—”

“We're real connoisseurs,” Firefly cut in.

“—and I've got to say, yours is definitely top ten, little bro.” She glanced over at her friend. “What do you say, Firefly?”

“Top ten? More like top three!”

It was getting hard to breathe, but I knew what they were doing. “Okay, okay, girls. Ha-ha. I get it. I'm sorry I was doing that...” I took a deep breath. “... And I'm sorry that you had to see it. But if you're not going to take it seriously, then—”

In a flash, Firefly reached out and grabbed my cock through my shirt, just below the tip. With that leverage over me, she drew closer again, pressing her muzzle right against mine, her eyes looking dead center into mine. “Oh, I am absolutely serious,” she said, her warm breath caressing my trembling lips.

I took half a step back, but Firefly still had a grip on my cock. She slid her hand up and down across as much as she could reach without unbuttoning my pants. That froze me in place. What … what was I even supposed to do? I had no idea how to react to this. It was just like when I’d tried to talk to girls – back when I actually thought something might happen. Every single muscle in my body refused to move, and I couldn’t even begin to fight it. How could I fight it? How could I tell my body to react when I didn't even know what I wanted it to do?

Firefly just laughed and glanced back over at Lighting. “Wow. I can see why he’s still a virgin.” She stroked my cock again. “Doesn’t even know what to do with himself.”

I wanted to argue with her, wanted to stick up for myself … but deep down, I knew it was true. How could I argue with that?

“I think you’re going to have to take charge, Firefly.” My sister came closer, examining me with a highly critical eye. “Maybe then he’ll finally loosen up a bit.”

Firefly looked at me and grinned deviously. She let go of my cock, and before I could even adjust to the sudden absence of stimulation, she reached up with both hands, pressed her palms against my shoulders, and shoved.

It caught me completely off guard. I stumbled backward a couple steps … until the edge of my bed hit my legs from behind. There was no way I was keeping my balance after that, and I went down, crashing hard onto the bed, bouncing a bit, and ending up sitting on the edge of it.

By the time I got my bearings again and figured out what had just happened to me, both Firefly and Lighting were standing right in front of me, looming over me. I stared up at them, overcome with awe, desire … and more than a little bit of fear.

“Close your mouth,” Lightning said. “You look like a fish, gaping up at us like that.”

My mouth obeyed her, snapping shut without even bothering to consult my brain about it.

Firefly came closer, much closer. So close that she straddled the edge of the bed on top of me, her knees on either side of me. I kept my hands firmly on the bed behind me, still not sure what was really happening here, still expecting to be sharply reprimanded the moment I stepped out of line and did something inappropriate. Surely this was just some kind of joke, right? They’d tease me along just enough to get me to believe this was really happening, then laugh at me for being such a fool.

It sure didn't seem like Firefly was just playing, though. She grabbed the tip of my cock through my shirt again, this time rubbing her thumb across the very top of it. Her thighs settled on top of mine, and she held the back of my neck with her other hand, making sure I couldn’t move away from her as she leaned in close, her firm breasts brushing my chest. Her hand held my head right where she wanted it as she came closer and closer, her eyes drifting almost closed.

No… She couldn't possibly be about to…

A spark of light shot through me when her lips met mine. Her soft, delicate lips that so teasingly played with my own.

I was too overwhelmed to participate in the kiss, sadly. I was stuck between the impossible thought that this might actually be happening to me and the realization that this was my first kiss … my first real kiss with a mare, anyway. I barely knew her. And we were kissing!

More than just kissing, actually. Maybe ‘making out’ would come closer. Firefly’s hand was working wonders on the tip of my cock through my shirt, and she’d sidled far enough to the side where she could rub the crotch of her running shorts across my thigh.

When she finally pulled away from the kiss, she licked her own lips, then leaned back a bit.

I looked down at her body, still in utter disbelief that I could ever be so close to such a hot mare, much less actually making out with her…

She let go of both my neck and my cock. For a moment, I thought that meant everything was over … but then she pinched the zipper in the middle of her sports bra thing. She didn't move it, not yet. Instead, she looked me in the eye. “Tell me my tits are better than your sister’s.”

“Hey!” Lighting dust said in mock-protest.

“I… I, um…” My eyes darted back and forth between Firefly’s hands on her zipper and her face. “They’re…”

Firefly rolled her eyes. “This is the part where you say, ‘I don’t know – I need to see them in order to be sure.’ Come on, kid, I’m making it easy for you. You could at least try.”

There was a long pause. She still didn't unzip. I cleared my throat, hoping that I’d be able to get it out without stammering. “I… I don’t know. I need to see them in order to be sure.” It felt good to say it. Even though it wasn’t even my own words, the confidence it brought was a heady feeling. It went to my head so much that I actually felt bold enough to add in a little bit more. “And, um… I probably need to touch them, too.”

Firefly’s eyebrows rose.

“Because, um, you know… Looks aren’t everything. How they feel is important, too.”

She laughed and looked over at my sister. “Wow, now that’s more like it. A little more confidence like that, and he’ll be bringing back a different mare every day in no time.”

Oh, so that had been it? They were just trying to give me a little more confidence? That made sense. And now that they’d accomplished that, they’d probably be going. Oh well, it was fun while it lasted, and I really should never have expected it to go any further than—

The zipper on Firefly’s athletic top began to descend. My eyes went wide as I followed its slow progress, entirely focused on that one spot. I barely even saw the smug, knowing grin she gave me as she slowly unzipped it.

A little more of Firefly’s cleavage was exposed, then a little more, and more still. As the zipper neared the bottom, her boobs spread away from each other a little, opening up her deep cleavage and letting more light in. I was entranced by the soft and utterly smooth-looking pink skin she was showing me.

She paused for a moment when the zipper hit the very bottom. “Are you ready, Pixie?”

I nodded vigorously, my eyes still locked on her chest.

In a smooth, practiced motion, she unhooked the zipper from the bottom, spread the athletic top open, and shrugged it off her shoulders … which only thrust her chest out toward me, making her tits look even more impressive.

And oh were they impressive! Each of them would be more than I could hold in both hands, and they were so nicely round, with barely any sag to them at all. Her prim, pink nipples were just as dainty and small as they’d been on the video. Only now … now I could see every little detail. The slight motion of them as Firefly breathed. The tiny bumps along her areolas. The sheer massive presence of them, jutting out from her chest toward me like that.

“Well,” Lighting said, looking on with a bemused smile. “You said you needed to touch 'em, didn't you?”

My hands came up without me needing to think about it. I held them in front of me, palms outward, just above Firefly’s breasts … but I hesitated there, hands trembling. This … this was crossing a line. They couldn't possibly want to actually go this far with me, right? This had to be the part where they’d tell me they were toying with me the whole time, where they’d laugh at me and call me a hopeless pervert.

Firefly held her hands over the back of mine and pulled them against herself. My fingers pressed into her soft pink flesh, curling around the round curves of her breasts.

I gasped. So this … this was what it felt like… Slowly, hesitantly, I began to move my hands, feeling the soft smooth curves of her tits, the firm nubs of her nipples, the jaw-dropping mass of her boobs, and the soft yet springy plushness of them. My eyes would have rolled back into my head if I wasn’t entirely focused on staring at those impossibly beautiful tits and the way they moved under my hands.

“I think he likes you,” my sister said, watching smugly.

Firefly released my hands to work on their own and traced her fingernails enticingly all over my body instead. “So, are my tits better than your sister's?”

“They're...” I trailed off for a moment, lifting them and pressing them together between my hands. “They're the best in the whole world!”

“Wow, you hear that, Lightning?” Firefly rubbed herself even more firmly against my thigh. “Best in the whole world. Moneyshot should be paying me twice what he pays you.”

“Yeah, well, it's not all about tits,” Lighting groused, crossing her arms under her own impressive chest.

“Yeah...” Firefly came in for another quick kiss, then began trailing her lips across my cheek and down my neck. “It's about skills, too.”

I shuddered to myself as Firefly's mouth traversed beyond the collar of my shirt. I could feel the warmth of her mouth even through the fabric, and I was starting to get some notion of what kind of destination she might have in mind.

She didn’t end up going quite where I thought she would, though, not at first. Before going any lower, Firefly planted her warm lips against my nipple through the shirt.

It ... it tingled. I'd never known that it could feel like that, but it was making a slight buzzing tingle rise up and down through my spine in a way that made my hair stand on end. I wished that I'd thought of suckling on Firefly's nipples when I'd had the chance, but now that she'd slid down lower on my body, I'd never be able to bend my head down that far. But I didn't stop touching her, even though it put my arms at weird angles. The plush and pliant curves of her boobs were too good to let go.

As she began trailing lower and lower, though, it became a bit of a stretch to reach her chest. But that didn't matter, because she was getting close, so close to—

I let out an involuntary moan when Firefly's lips enveloped the tip of my cock through my shirt. She wasn't shy about it at all. She looked up at my eyes, twisting her head slightly back and forth as the heat of her lips soaked into my cock. She went even lower, drawing some of it – shirt and all – into her mouth, only stopping when the fabric stretched too far. I had the distinct impression that if it weren't for the shirt, she would have gone all the way down.

Lightning must have gotten that impression too, since she came over and rested one knee on the bed beside me, grabbing at the hem of my shirt. “Is that getting in your way? Here, let me take care of it.”

She grabbed my shirt, pulling it upward. My breath caught in my throat as my belly – and a certain something else – was exposed to the air. Firefly had to take her mouth off of me for a moment to let the shirt come out from between us, now with a big wet spot on it. And I even had to take my hands off her boobs in order to let Lightning pull the shirt up over my shoulders.

Firefly was only off of me for a moment, though. As soon as she could manage, she was back on my cock, and now there was nothing at all between me and her mouth. My tip squeezed in between her warm, wet lips, entering me into a world of pleasure that I'd never imagined before. Sure, I'd spent lots of time imagining it happening, but I never could have imagined what it would really feel like. It was far more overwhelming than I thought it would be, and it made everything up until this point seem like nothing.

She shoved herself so far down on my cock that I couldn't reach her breasts anymore. And it just went to show how incredible this was that I didn't even care. Firefly took me into her throat effortlessly, as if she'd done it a hundred times before. Given her line of work, she probably had. The warm wetness of her mouth had been enticing, the flicking of her tongue invigorating ... but the supple softness of her throat was absolutely breathtaking. My eyes rolled back in my head as I gave myself over to the pleasure of it.

“Aww... Do you miss my friend's tits?”

I focused my eyes again. Lightning was leaning over me, still with only one knee on the bed, but now turned to the side so that she was all but in my lap. I blinked at her a couple times, trying to put together a coherent thought, but I ended up just staring down at her sports bra.

Lightning lifted it over her head, letting her tits spill out of it right in front of my face. She grinned down at me. “Go on, you little pervert. You think I've never noticed the way you stare?”

I was certainly staring now, at least. Lightning's tits were only slightly smaller than Firefly's, and just as perky and round. The pink of Lightning's nipples stood out far more against her pale green skin, and they were much larger than Firefly's, which only drew my eyes more and more. Slowly, my hands came up.

My sister leaned closer, licking her lips as she watched my hands. She gasped slightly when I finally touched her breasts. “Mmm, yes...”

Lightning's boobs were softer than Firefly's, soft enough that when I brushed my fingers over her nipples, the pink nubs tended to sink back into her breast a little rather than stick out proudly. This time, despite the incredible stimulation from Firefly down below, I wouldn’t forget. I leaned in closer, over Firefly's head, and took one of my sister's nipples between my lips.

She let out a girlish little moan as I sucked it into my mouth and rolled my tongue over it. “Oh Pixie,” she said. “That feels nice. Don't stop.”

Lower down, Firefly made quick work of unbuttoning my pants and slipping them – along with my underwear – down my legs. I had to lift up my hips for a moment to let them pass.

And I was glad that I did. As soon as the path was clear, Firefly went all the way down, impossibly swallowing my entire length, all the way down to my sheath. I instinctively bucked my hips into her mouth ... not that it did anything – it just forced her head to bob up and down to the same rhythm. Once I had the good sense to sit still, she kept bobbing her head in about the same rhythm, sending me to utter bliss by fucking me with her throat. I knew I wouldn't last long like this – I could already feel the pressure building.

Firefly must have been able to tell somehow, too. In one long, lascivious motion, she lifted her head back up, letting the length of my cock slurp out from between her lips. It slapped wetly against my belly.

“He's not going to last long, Lightning. If you want some, you'd better get down here.”

To my utter shock, Lightning Dust did pull her chest away from my hands and mouth, just long enough to shift her weight to her other leg and sink down to kneel on the floor next to Firefly. She touched my cock – my own sister touching my cock! – and ran her hand up and down my length, sliding easily in the sheen of Firefly's spit.

My mouth hung open as I stared, utterly shocked. But that was the least of the shocking things that were about to happen.

Firefly gave a playful little laugh. “Is that all you're going to do, jerk him off? He could do that himself.” Rather than wait for a response, she grabbed the back of Lightning's hair and pushed her head forward until her lips touched the tip of my cock.

Lightning's eyes went wide as she stared down the length of it, but she didn't make any move to pull away, and her hand kept working lower down on my shaft.

“There you go,” Firefly said, pushing Lightning's head down on my cock, forcing my tip into her mouth, then into her throat. “Show your brother a little sisterly love, hm?”

Once Firefly had my sister started, Lightning kept on going all on her own, sucking greedily and deep, slobbering all over my cock as she let it plunge into her throat over and over again. She wasn't quite the master of it that Firefly was – she gagged whenever it went too deep, and she wasn't able to go all the way down to my sheath.

Not that it mattered. A wildfire of panicked pleasure was burning in my head from the insane knowledge that this was my sister's throat I was feeling convulse around my cock. And Firefly didn't let the rest of me go unattended, either. She bent down lower, planting her lips against the base of my cock with a heavenly series of deep, wet kisses. And before I knew it, she was working her way even lower, tonguing over my sheath, and eventually making her way all the way down to my balls. She kissed and suckled them just as greedily, rubbing them all over her muzzle in her enthusiasm.

It was overwhelming, absolutely overwhelming, and only my shock and near-panic from the unexpectedness of it all kept me from cumming down my sister's throat right there on the spot.

As it was, Firefly again seemed to have some kind of supernatural ability to tell when I was about to cum. Abandoning my balls, she extracted herself out from underneath my sister and out from between my legs, then sensuously slid herself back up my body. “Don't cum yet,” she said in something just above a whisper. “You still want to lose your virginity, don't you?”

I looked at her, and the desperation in my eyes must have been obvious.

“Slow down, Lightning. We don't want him popping off just yet.”

My sister did slow down, but now that she was going slowly and lovingly up and down my cock, it felt just as good, maybe better. It was still just as hard to hold myself back.

Hoping to distract myself a little – and because her tits were still absolutely fantastic – I reached up for Firefly's chest ... but she caught my hand, instead directing it downward and turning it over, palm up. She slid my hand right over the crotch of her running shorts, squeezing it into the gap between her thighs.

I could feel the slight bulge of her pussy through the shorts – the heat of it, the wetness of it. She'd actually soaked all the way through them already.

“You feel that?” she asked.

I nodded, in somewhat of a stupor as my sister plunged herself even deeper than before on my cock.

Firefly smiled at me, a coy little smile that spoke volumes. “I want your cock inside me right there.”

I nodded again, faster this time.

That only made her smile grow wider. “Lightning, honey, you mind giving me a turn? I think it's time I popped this colt's cherry.”

It all happened so quickly. By the time my sister pulled her mouth off of my cock, Firefly already had her shorts off. She wore nothing at all underneath them, which partly explained how they'd been soaked through so easily. Of course, it was also because Firefly's pink pussy lips were absolutely sopping with her sticky-clear juices. A little drop of them trailed off and landed on the tip of my cock as Firefly positioned herself above my lap.

Holding onto my shoulders, Firefly slowly lowered herself. Lightning held my cock in place with both hands, guiding me toward the dripping entrance of my very first mare.

Firefly paused when her palpably hot pussy lips kissed the spit-slick tip of my cock. “You ready for this, Pixie? You ready to give me your virginity?”

I trembled, my mouth gaping at what I saw right in front of me: one of the hottest pornstars I'd ever seen, completely naked and perched with her legs outstretched so that her pussy opened slightly ... right on top of my cock. Her juices leaked down the length of my shaft toward where my sister's hands held my cock in place, but Lightning leaned in and licked Firefly's juices off of me before the little dribbles got down far enough to get on her hands.

“Well?” Firefly hooked one finger under my chin and forced me to look up into her face. “Are you ready or what? It's not easy holding myself up like this.”

“I'm... I'm ready.” No matter how hard I tried to sound confident, my voice still wavered.

Despite the hesitancy in my voice, that seemed to be enough for Firefly. She pressed down. Her soft pink pussy lips pressed and stretched against the flattened tip of my cock until they finally spread out around my entire tip and swallowed it.

Already, from just the tip, I could tell that this was going to be entirely different – yet another level of pleasure I'd never been truly able to conceive of before. And it was. Firefly's tight, soft warmth slowly spread lower and lower down my cock as she rocked her hips around in gentle circles, helping my already-slippery cock slide into her that much easier. The warmth and welcoming depth of her was unbelievable. How could she even have room for all that cock inside her? And yet, inch after inch flowed into her pussy with absolute ease, all the way down until her pussy lips stretched tight around the thick base of my cock at the very bottom.

Before I could adjust to this new fleshy heaven I found myself in, Firefly started bouncing. It was gentle enough. She barely rose a finger's breadth before letting herself fall back down and take my cock entirely inside her again. I wrapped my arms around the supple curve of her back, my fingers gripping her wings, and held on tight as she opened my eyes to an entirely new world.

My sister had been relegated to lower and lower positions on my cock as Firefly took it inside herself, until there was nothing left and Lightning had to abandon my shaft altogether. She kept herself busy, though, taking her own turn with my balls. She hummed happily to herself as she licked and kissed their plump curves, which drove me to even crazier levels of pleasure.

Of course, I couldn’t take much more of that. Not with Firefly's inner walls caressing my entire cock and my sister's tongue slathering all over my balls. It felt like my whole crotch was enveloped in the warm, wet paradise of these irresistibly sexy mares trying to coax the cum out of me.

And it was coming. Oh, it was coming. I knew it wouldn't be long now. I tilted my hips along with Firefly's rhythm, getting just a bit deeper inside her with every bounce. The tip of my cock was already beginning to flare, locking me in against Firefly's womb.

“Not so fast, buster,” Firefly said. “You've got another pussy to fill before you blow.”

What?

While I was reeling with shock and struggling to process all the implications of what Firefly had just said, she lifted herself up off of me. My throbbingly hard cock slipped out of her inch by inch, until the flared tip finally squeezed out between her pussy lips with a wet plop. It slapped against my belly again, absolutely coated with Firefly's milky-clear juices.

And then Lightning Dust was taking her place. She'd already taken off her shorts at some point when I hadn't been watching, and she placed her bare, wet pussy against the tip of my cock just like Firefly had.

“You've been wanting this for a long time, haven't you?” Lightning said. It wasn't really a question. She knew.

I hesitated for a moment, then nodded anyway. There was no point in acting innocent, not anymore.

She reached down and rubbed my flare – now swelled out as wide as her hand – against her pussy lips, spreading a mix of Firefly's juices and her own all over her pussy lips in preparation. Once she thought she was ready, she looked me in the eyes and said, “You could have just asked anytime.”

I would have never thought that my flared tip could fit inside my sister's tiny-looking tight pussy ... but her smooth, perfectly shaven lips stretched wider than I would have thought possible, and my flare was able to squeeze more than I thought it could. With the slightest whimper of effort, Lightning managed to cram the hugely flared head into her pussy.

And once that was in, the rest flowed in like magic. My sister slid down my cock like the pro she was, taking it to the hilt in one impressive motion.

Once I was all the way inside her, my flare stretching open the entrance to her womb, she leaned in close and whispered into my ear, “Just one rule: don't cum inside.”

What? But how was I supposed to...? Didn't she know how close I already was?

“Yeah,” Firefly chimed in, sidling up next to me on the other side. “You don't want to get your own sister pregnant, do you?”

Pregnant? I would have broken out into a panic and run around the room if not for the overriding biological imperative to breed this mare. What? Didn't pornstars use some kind of birth control? There was no way I could actually get her pregnant ... was there? Oh Goddess! What had I gotten myself into?

Firefly's dastardly grin was the clue I needed to figure it out. This was the joke they were playing on me. This was their revenge for me perving out on them. But how could they possibly think this was a good idea? What if I really couldn't hold myself back? What if I did get my sister pregnant?

That very real possibility didn't seem to bother them at all. As Lightning Dust began rocking her hips sensuously back and forth on my lap, Firefly reached around behind my sister's ass to cup my balls in her gently squeezing hand, as if she was trying to milk the cum out of me. Did she want me to get her friend pregnant?

Did I want to? There were a million reasons that I shouldn't, but the feeling of my sister's warm, wet inner walls gliding back and forth on my cock was driving every single one of them out of my brain. Instead, I was increasingly becoming a slave to a deeper, more primitive side of my brain that I'd never become acquainted with before. It had simple desires: Mare. Tits. Pussy. Breed.

It took every ounce of my inhibitions to keep me from blowing my load straight into my sister's pussy. My hands, left to their own devices, wandered freely. They explored the deliciously firm curves of Lightning's ass, reveled in holding the breasts of two different mares in each hand, and one even found its way into Firefly's sopping-wet pussy.

“Pornstar finish?” Lightning said quietly, leaning over toward Firefly. I wouldn’t have heard it if it weren't for the way all my senses were getting oddly sharp, making me hyper-aware of every little detail.

Firefly nodded. “Yeah. Give him something to remember.”

I held on as long as I could ... admirably long, in my estimation. It could only have been a minute or two at most, but I had already been about to pop before my sister even got on top of me. What was I supposed to do?

“Mmmn!” I cried out. “I'm... I'm gonna—!”

Moving like her namesake, Lightning whipped herself up off of my cock and somehow got down on the floor in front of me. Firefly was right there with her. Four soft, delicate hands pumped up and down my shaft as both mares pressed their faces together right in front of my hugely flared tip. They stuck their tongues out, licking around the hole in the middle in their anticipation of what was to come.

When it did come, it seemed to surprise even them. The first thick stream of cum slapped against both their faces, splattering both their cheeks and into their hair. It was met by a pair of surprised gasps ... but their surprise didn't stop them from taking it like professionals. Both of them were in place again for the next gush of cum, catching it on their pressed-together tongues, then lapping it up greedily off of each other's faces as pulse after pulse from my cock replenished what they were licking away. It was too much even for them, splattering all over their faces and dripping down onto their tits and even farther down their bodies. But they seemed to revel in it, practically bathing in it as they rubbed it into each other's tits and tasted it on each other's faces.

And when my orgasm finally started to fizzle out into smaller and smaller spurts, my sister took my cock into her mouth one last time – deep into her mouth, letting me empty the last dregs of my cum right down into her throat as she swallowed it down. Firefly pushed in next to her, messily mouthing along the side of my shaft and reaching out to massage every last little bit out of my balls.

That coaxed a couple more spurts out of me, more than I thought possible, and enough to make my sister gag a little bit. But once those were spent, I was done. I collapsed heavily back down against the bed, my chest heaving. Stars swam in my vision, even though I tried to blink my eyes and make them go away.

Before I could even catch my breath, Lightning Dust and Firefly loomed over me, clothed in nothing but a copious spattering of cum.

“Not bad, not bad,” my sister said.

Firefly stuck her finger against her lips thoughtfully, ignoring the cum dripping from it. “Say ... do you think you could do that in front of a camera?”

“I... I guess,” I managed to croak out.

Lightning grinned. “I like where this is going. Put your two weeks notice at the weather squad, little bro. We're going to put in a good word for you with Moneyshot, and soon you're going to have a new job that pays better and is way more fun.”

“Huh...?” I said, blinking. My head felt all fuzzy, and it wasn't working very efficiently at the moment.

Firefly sniggered and lightly punched my arm with her sticky fist. “Cheer up, kid – looks like you're going into the family business!”

Author's Note

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