Breed.

You look at her. You heard what she said, but you’re not sure you’re following.

“Breed?” You ask, switching your gaze between Aphrodite and Everleigh. Leigh looks just as confused as you.

“Yes. In order for the human race to survive, exo-colonization is required. For this to happen, you need to grow a population at a rapid rate. That’s what this program can facilitate.”

She fades out, only to be replaced by a hologram of a large piece of equipment. It looks like a vertical tank, filled with an opaque blue liquid.

“In-Grun series 1 state-of-the-art growth vats.”

The hologram shifts to an image of a nervous system.

“Cutting edge gene therapy and hormone supplements.

The hologram shifts back to her Avatar.

“This program will provide a large population boom for this planet, and kick start a functional society.”

You interrupt her. “Okay, but there’s only two of us, and we’re related.” Everleigh looks mildly relieved that you spoke up.

Aphrodite shifts her gaze to you. “Once again, cutting edge gene therapy. We can eliminate and and all birth defects just with supplements, once our lab is operational.

Your sister looks at you, she looks conflicted.

“Okay, let’s come back to this. For now, we need to worry about this atmospheric scan first and foremost. Aphrodite, what do you need?

“Let’s deploy my autonomous research module, so that I may begin gathering data for you, follow me.”

She leads you out the door, and on your way out, Everleigh stops you. She looks up into your eyes.

“Hey, uh, I’m gonna hang back. I’m not feeling right.” She says, her eyes pleading you.

You take pity on her. “I’ll be back soon.” You say with a smile, and turn and leave before anything else happens. You follow the AI outside and to a large module next to the tree line.

She gestures towards the <<ACTIVATE>> button. You give it a press, and the whole structure unfolds itself, transforming into a tall tower, covered with equipment, a small runway, complete with a couple autonomous drones, and a small lab for analyzing samples. You look around for a door, but don’t see one.

“This facility is entirely autonomous, and will be co-ordinated by my subroutines.” She points towards the runway. “Now let’s get to sampling”.

A drone rolls out of the small hanger, and buzzes its way down the runway, taking off and climbing, circling overhead.

“I’m getting some results, processing.” She gives you a quizzical look.

“Scott, please describe your symptoms to me.”

You shift awkwardly. “Uh, Well. I seemed to get really warm, and, uh..” You wanted to avoid this awkwardness. “I felt really horny.” You shamefully admit, casting your eyes downward.

“That explains a lot.” She says, and pulls up a scan for you to see.

“There’s a naturally occurring aphrodisiac permeating the air here. This must be why this planet was chosen for my Program.” This would explain your symptoms, and Everleigh’s as well. She clasps her hands together, and faces you. “This is something that will not go away, it’s a part of the air here and we can’t filter it out back at the base.”

You look at her, and don’t know what to feel. You’re the last man alive on a planet with only your sister, and the air here is strong enough to make you want, no, you need to release yourself, and soon. It all makes sense now.

You stand up, and look Aphrodite in the eye. “I’m going to get this program rolling. Humanity needs us to get this right.”

She smiles at you, and says. “This was the plan from the beginning, this outpost is designed to support you in any way you need.”

You walk back up to the dormitories, and enter your apartment. You don’t see Everleigh anywhere, so you wander around and up the stairs.

Up in the loft, you find your sister. The hoodie is laying next to her on the bed. Her modest but perfectly perky breasts are barely contained in her bra, but her focus is shifted elsewhere.

Her left hand is rubbing her stomach, and her right hand is in her panties. You can see how soaked through she is, even the bedsheets are visibly wet. She hasn’t noticed you yet, but as she digs her fingers deeper inside herself, she opens her eyes and notices you.

She freezes. She didn’t know you were home. She was so full of desire, she needed to release. She sees her older brother, a massive, heroic, savior of a man, standing at the top of the stairs, looking into her eyes, and in his hand, is his dick.

It’s massive. It had to be longer than her forearm. And thicker around than either of her legs. She thought she had caught a glimpse of it earlier, and it was all she could think about. Scott was her own brother. Her flesh and blood, but something deep down inside her knew that’s that he’s the only one that could fulfill all of her desires. It’s always been like that, since they were little kids. She has always loved her older brother.

You stand there, and realize that Everleigh is looking into your eyes, but she hasn’t stopped moving her hands. You keep your gaze locked to hers as you lean down towards the bed. You can feel your 15-inch cock throbbing with your heart beat, your grapefruit-sized balls sagging heavily with millions of your DNA carriers, rimming and ready to go.

You can’t think straight. You don’t know what you’re thinking. All that matters is that you understand just as much as Everleigh does, that the love you’ve always wanted has been here all along. You lock eyes with her.

“Scott. I, uh…” she doesn’t know what to say. You reach forward, putting a finger to her lips. She stops, and looks you in the eye. Slowly, she kisses your finger, and slides it into her mouth, sucking gently.

You lean down, and now you’re over her. On your knees with one arm over her shoulder supporting yourself. She takes her hand off of her stomach, and places it on yours. Her touch is so gentle, you can barely feel it. She slowly draws her hand down to the waistband of your pants, and hooks her finger around it.

She slides it down, and your dick springs out of your pants. It flies out and bounces down, slapping her in the stomach. You take your hand out of her mouth, and feel her perfect titties through her thin lace bra. Your dick lays against her stomach and up onto her breasts, leaking Precum into her cleavage.

Her eyes go wide as she sees it’s true lentgh. You’re positioned so that your pelvis is in line with hers, but your dick is so massive that she can stick out her tongue and lick it.

Everleigh looks you in the eyes, opens her mouth, and slowly puts it around the top of your cock. Your dick throbs with anticipation, and you almost lose yourself. Whatever’s in the air here, it’s strong.

She sucks gently, pushing her head forward and taking the whole head of your cock in her mouth. With her free hand, she reaches up, and tries to wrap it around the base of your cock. Her hand goes about halfway around it.

You thrust forward, unable to take it anymore. You take her by surprise as your cock shoves its way into the back of her mouth. Her throat tightens around your tip, and that’s enough to lose it.

You feel your balls swell, as a massive convulsion wracks your body, emanating from your crotch. Your orgasm lasts almost a full minute, as you pump shot after shot of your sperm into your little sister’s mouth. She gulps it down as fast as she can, revealing to you that she’s got a kink for cum. Her eyes go wide as she struggles to swallow it all. Your dick continues to pulse and throb, shooting more cum than you’ve ever been able to shoot. Whatever’s in the air must be strong, because when you’re done, your dick still stands rock hard, and you can feel your nuts churning, ready to come again and again.

Everleigh coughs, and looks up at you.

“Oh my god Scott, your dick is HUGE!” She says, and lifts both her hands to grab it. She wraps them around your dick, and her fingers just barely can’t wrap all the way around it. She starts to move her hands up and down, slowly jerking off your massive length.

While your body returns back to normal, you slide one hand down, and into Everleigh’s panties. It’s unbelievably warm, and so wet that you can see her cum stretch between your fingers when you inspect your hand. Her breathing is ragged, and her face is flushed a bright blood red. You adjust yourself, so that your dick lines up with her vagina. With one pull, you rip her panties off and toss them aside.

Everleigh looks you in the eyes, puts one hand around your neck, and pulls herself up to you. She stares for a second, the most loving gaze anyone’s ever given you, before pulling herself further up and kissing you. Your lips lock for a long while, with your eyes closed, listening to nothing but each other’s heartbeat.

“Scott.” You open your eyes, and she’s speaking to you. “Scott, I’ve always loved you, and I always will.” She looks up at you with a pained expression. “Please, Big Brother, take me, fill me, make me yours.”

You line up your dick with her vagina. It looks comically small next to your penis, but you know that she was given proper gene therapy as a child, and should be able to stretch in just the right ways without hurting herself.

“Scott please, I need it so bad, please, fuck me. Fuck your little sister.” Everleigh pleads, moving against her will, and grinding her wetness up and down your tip.

You press forward. Your head faces some pressure before it slips inside. It’s unbelievably tight, and incredibly wet. Perfectly warm, you can feel the folds of your little sister’s most sacred place starting to pulse and stretch around your massive member. Your little sister gasps, and her hand flies out to push against your chest. Concerned, you stop, but as you look into Everleigh’s eyes, you can see her pleading you for more. You push forward a tiny bit more before you feel it tighten up in front of you. You look down at your sister, and she stares lovingly up at you, her eyes sparking a brilliant Sapphire in the sunrise.

“Scott, I’ve always loved you. I saved myself for you. I was going to find a way to live my life with you, that’s why I came out here.” She’s barely able to speak through her moans. You’re still, but she’s grinding herself up and down on your cock, and you can feel that tightness still in front of your head.

Her Hymen is still intact.

She had saved herself for this new life out here on this planet, and she was giving herself to you. Her confessed true love, her big brother. You pull back your hips, and thrust hard against her Hymen, it holds, barely.

“Oh my god, oh my god, oh my- FUCK!” she says, and looks down at her flat stomach. Right now, your dick is making her stomach bulge outwards, as her entrance stretches towards its limit to accommodate you.

You push forward, and she winces in pain as your girth finally tears her hymen open. She’s so wet, her cum is constantly lubricating your legs and chest, and soaking the sheets. Slowly you push forward, until most of your dick is inside. You can see your cock stretching her out, as the bulge goes even past her belly button.

Everleigh moans and shudders, and grabs your arm as her body convulses. She’s coming, and you taking her virginity is what pushed her over the edge. She looks down, and her mouth goes wide when she sees how far into her your dick is. You can visibly see the outline of your massive dick, stretching her entire stomach upwards.

“Oh my god, ohmygodyourdickis SO HUGE!” Everleigh is losing all of her bodily control, as her eyes roll back, signaling the onset of a massive orgasm. She goes limp for a second, and you grab both of her arms and lift her up onto your dick. You start slowly pounding her from behind, and you wrap both of your hands around her neck and squeeze. She starts to ****, and you can swear you can feel her vagina get impossibly tighter.

Her insides start to convulse and milk you, and as you feel a new wave of wetness inside, you begin to rut in and out of her. You relax your hands, but keep them firmly around her neck. She starts to moan in rhythm with your thrusts, as your dick pierces her, and fills her to the point where you can see your cock head bulging out of the top of her taut stomach, almost nearing her ribs. You rip off the straps to her bra, and her perfect perky breasts fly free. You grab one with your left hand, and you feel the nipple is already hard as a rock.

She comes again, this time collapsing back and becoming silent. You can see her orgasms taking over, so intensely that she goes limp. Her pussy, on the other hand, clamps down on your dick, and you decide it’s time to make her really feel you. You drop her onto the bed, and roll her onto her back. Her eyes are wide and looking all over the place, her hands reach out and grab onto anything they can, ripping the blankets up off of the bed. Her pale skin is flustered, making her light freckles shine in the sunlight. You reach up and undo her ponytail, and her beautiful silky jet-black hair runs down her back. You line your dick back up with her aching folds, and then shove it all the way in. You get until there’s only about 3 inches of your dick sticking out of her, and feel some resistance.

Knowing it’s the entrance to her womb, you begin to pound as hard as you can, turning your younger sister under you into a mess, as she comes constantly from your vaginal ****. Good thing she was modified to stretch, because the size difference is real. You’re almost twice as tall as her, but you’re a broad man, so you weigh over three times her weight. She’s a mess, visibly wincing with each thrust of your cock, but the wetness tell you that she’s enjoying this above all else.

“Scott, oh my FUCKING god Scott”. Everleigh is cumming nonstop, and she just keeps repeating your name. “Scott, oh my god, Scott I love you so much. I’ve been wanting you to take me like this since we were in high school.” Your little sister. Your best friend growing up, your secret crush for so many years. She’s right here, with you, in all of her beauty, and there not another soul around to tell you what you can and can’t do.

As you feel your balls tighten, you get ready to cum. You imagine your sister, filled to the brink with your cum, filled to the brink with your children. Our children.

“Scott. Fill me up, please. Breed me.” Everleigh moans, admitting to you her deepest desires. “Please, Big Brother, please, I’ll do anything. Please just come deep in me, fill me up, give me your children. I want to raise our babies, here, with you. I wouldn’t have it any other way.”

It becomes too much. You pull out all the way, and then slam your dick all the way inside, as deep as you can go. Everleigh lets out a surprised yelp as you feel your dick go all the way inside, smashing it’s way into her womb. You feel your tip hit the back of her womb, and your cock explodes into wave after wave of powerful orgasm. Everything about this situation. The taboo of it, the depravity of it, the degeneracy of it, turns you on. You can see it does the same to your baby sister, as you come, you feel her come harder than ever before you can see her stomach muscles convulsing around the bulge from your massive cock, her walls collapsing and squeezing and rolling your penis, trying to extract every single ounce of cum.

You can feel your balls constrict inwards, and you come an almost impossible amount. More than you’ve ever seen a human come in the exonet vids. Your orgasm lasts minutes, and the entire time, you’re pumping your super-sized human, aphrodisiac enhanced cum deep inside your skinny, tiny, petite little sister’s womb. You watch as her stomach slowly becomes less flat, as you fill her up you can see her stomach bulge outwards from the incredible amount of cum you’re filling her with. When you’re done, she looks almost a few months pregnant, but you know it’s just your cum stretching her from the inside.

She rolls to her side and locks her legs together, determined to keep all of your cum inside. You look into Everleigh’s eyes, and you know everything has changed. Slowly, you pull your cock out, triggering another orgasm for your sister as your dick stretches her folds on its way out.

You lay there, cradling her for what feels like an eternity. You feel her drawing circles with her finger on your chest, and she finally looks up into your eyes, and smiles.