Jake: Found it! “For extra fertile ovulation.” That’s you! It’s expired so take three.
Kelsei: It’s hot out!
Jake: I know!
Kelsei: It’s no fair you get to go shirtless!
Jake: That’s why guys are superior. That, and we got actual pockets.
Kelsei: Ugh, I can’t take it.
Kelsei takes her shirt off, revealing her white bra and tiny pink bow in the middle. Jake gives his sister a glance.
Jake: Fine, just keep your bra on.
Jake and Kelsei sit and watch TV for 20 minutes on a hot summer afternoon. Sweat pours from their bodies. The TV briefly shows women in bikinis doing a car wash.
Kelsei: That looks fun.
Jake: I can’t even move!
Kelsei: When is the A/C repair guy coming?
Jake: Next week.
Kelsei: Shit. I keep sweating!
She fans her bra, noticing her tits are soaked.
Kelsei: Oh my god, sorry Jake. You’re gonna have to put up with it.
Kelsei undoes her bra and lies back on the couch. Jake hesitates to complain. His groin stirs and he leans forward to hide his growing erection.
Jake: Oh come on! Can’t you wear something? You’re my sister!
Kelsei: So? It shouldn’t matter. You can’t get attracted to your siblings. Biology isn’t built that way.
Jake: Just, like, put a pillow between us.
Kelsei: God, ok.
They find a movie neither of them are watching. Unable to focus due to the heat. Jake tries not to daydream about his sister’s tits, but his erection has filled out, and every slight movement just stiffens it. Jake can only see his sister’s head behind the big pillow, and leans back. Hoping she won’t lean over and see his erection.
Kelsei: I am glued to this couch. Fused. Can you refill my water?
Jake: Why can’t you do it?
Kelsei: I told you, I’m glued to the couch.
Jake: Ok.
Jake continues to sit on the couch.
Kelsei: Aren’t you gonna get up?
Jake: I am up. I’m refilling it right now. Here you go.
Kelsei sees Jake looking far past the TV, clearly lost in his own world. She leans over to check on him and is dismayed by the roll of cookie dough sticking up in his shorts.
Kelsei: Fine, I’ll get it.
The couch unsticks like velcro from her back. She takes both glasses to get refilled, and stops to fan her booty shorts away from her.
Kelsei: Fuck, it’s hot! Lemmie go change.
Kelsei comes back in with a black, six inch skirt and no top or panties. As she walks in she takes a good look at her brother’s cock.
Kelsei: (We’re siblings!)
She sits closer to the pillow, enough to take glances at his cock. Her hands are in her lap a moment later.
Kelsei: Oh my god, I just put on a mini skirt, I feel so much better. You should try it!
Jake: Why would I…
Kelsei: It’s just us at home. I mean, it’s practical. Men like to do what’s practical, right?
Jake: Nah, you’re gonna take pictures and blackmail me.
Kelsei: Wow, that’s low. I’m actually trying to be nice.
Jake: Wait, let me try something.
Jake turns to hide his erection and stands up. Kelsei is able to get a glance anyway. He walks back in, having worked it down, wearing a towel around his waist.
Jake: Not bad.
Kelsei: That’s some heavy cotton, maybe something a little less?
Jake: It’s fine.
Jake sits back down and never notices the pillow is missing. In his dazed state, his glances at his sister’s tits become longer and more emboldened. Kelsei rolls her eyes, before glancing at his crotch again. Then she fans her skirt, showing off her pussy for a moment. His eyes dart to it.
Kelsei: Sorry, it’s just so hot!
Jake: No panties? Seriously?
His erection stirs again. She gets on all fours to vent her back, and flaps her skirt. Her head sinks into the back of the couch with her ass in the air, continuing to fan herself.
Jake: Do you have to do that right here?
Kelsei: Oh my god, why do you care? I’m your sister.
Jake stares at the side of Kelsei’s ass, desperately praying it points towards him. Instead she widens her stance.
Kelsei: Men are lucky, their organs get to cool off on the outside. I can’t really widen my pussy out to let air through.
Jake: (I could definitely help you out with that!)
Kelsei separates her pussy lips with two fingers and tries to get air inside.
Kelsei: Can you get the fan and point it at me.
Jake thinks about arguing, but stands up just to see his sister’s pussy. His erection lifts his towel. He turns on the fan and points it at her, taking his time to aim it. Her skirt flutters and she points her pussy directly at the fan.
Jake: Let me get me too.
The air hits his crotch and Kelsei is hit with his musky odor. Jake hopes the coolness will shrink his erection, but it stiffens from the vibrations. He tries to walk backwards and bumps into the coffee table.
Kelsei: I know you’re hard. You don’t have to hide it from me.
Jake: Sorry, it just happens.
Kelsei: It makes sense, you increase the surface area to help cool down.
Jake: Huh, I guess.
Kelsei: Wish I could do that. I want the fan pointed directly at my cervix.
Jake: Jesus Christ.
Kelsei: Sorry, but it’s really bothering me.
Jake’s erection sticks through his towel. Debating whether he should sit down next to her or on top of her.
Kelsei: Is that there to help?
Jake: No.
Kelsei: It’s not like it’s actual sex, you’re just widening my pussy with your dick.
Precum drips from Jake’s cock.
Jake: Are you serious?
Jake stares at Kelsei’s dripping wet, hot, bald pussy.
Kelsei: Just don’t cum inside me, ok?
Jake: (Oh shit, she’s ovulating!) Can’t you use some toy, or something?
Kelsei: I don’t want to put some random object in there. Besides, I don’t think anything will fit as good as your dick. Dicks are literally made for pussies. I want dick.
Jake: Yeah, I bet you do! (Did I say that out loud?)
Kelsei: Shut up!
Jake: One time, ok?
Kelsei: Oh thank god!
His hand slaps her ass and she arches her back. His towel falls on the floor and she reaches for his cock, guiding it in.
Kelsei: Oh fuck, your dick is so fat!
Jake: Ah, sorry!
Kelsei: It hurts but it’s perfect. Go deeper, please! Oww! I think you just broke my hymen.
Jake: Shit!
He slides it in a bit further and pulls back, then forward, deeper each time. Taking her doggy style on the couch in the living room. Curtains open and everything.
Kelsei: Fuck, that feels good! You’re really widening me out! God, you’re so big!
Jake: I’m gonna go deep.
Kelsei: Yes! Oh fuck! God, my fucking cervix! Widen it out, make sure air can flow through.
Jake: Hnng!
Kelsei: Oww! Just keep fucking me, nice and deep! Remember not to cum inside of me!
Jake: I won’t!
Kelsei: Oh god, you’re gonna make me cum! Let me cum around your dick!
Her pussy strangles his cock with a heart stopping orgasm. Her toes curl and her eyes roll in the back of her head. Her cervix relaxes, then suddenly, he pulls out. Leaving them both unsatisfied.
Kelsei: Hey!
Jake: I had to!
Kelsei: Oh, alright. Hey, my pussy’s a bit wider, I can feel the air even deeper now.
Jake: Guess we gotta keep going.
Kelsei: Let me get my head out of the couch. And, just in case, let me put my hair band around your cock to keep your urethra closed.
It acts like a cock ring, and brings his cock to his full potential. She lies down for missionary, but he throws her legs up in a mating press. Veins pop from his dick and it turns reddish purple. He slides it in deep.
Kelsei: Fuck, it’s huge! This is really gonna stretch me out!
Jake: Your pussy’s so fucking tight!
Kelsei: Keep going! Make me cum again! It’s gonna widen my cervix!
Jake mashes his cock against her womb over and over. Precum paints her cervix and helps the tip poke in. Her hairband gets pushed to the base of his cock and irritates her pussy as he bottoms out.
Kelsei: Oh fuck, this feels so good!
Jake: Oh shit, I see someone!
He lies flat on top of her.
Jake: It’s the mail man! Stay still, the curtain is open!
Kelsei: Oh shit, I’m gonna cum!
Her pussy goes off like fireworks, spasming and clamping down on his dick. Her cervix engulfs the head.
Jake: Oh shit, that feels good! Your pussy is milking my dick! It’s making me cum!
Kelsei: Pull out!
Jake: I can’t! He’s gonna see!
Kelsei: Wait, I can tighten the hair band!
His orgasm builds. She pulls the hairband, hoping to close his urethra, but his cock only stiffens and he sinks lower into the couch, pinning his sister to it.
Jake: Oh god, I’m sorry! I can’t help it!
Kelsei pulls the hairband even tighter as her brother’s cock throbs inside of her. And for a moment, it works, nothing is spilled, then suddenly, cum fires out like a hose under pressure. It blasts her womb point blank. Semen fills it instantly and every throb after only makes it inflate. Sperm attack her eggs like ants to a lollypop.
The hairband snaps and the floodgates open. Her womb grows visibly from the outside. Her eggs begin to weaken. Hundreds of sperm dig their way in, completely covering their surfaces.
Jake: He’s still there!
The doorbell rings the moment Kelsei gets impregnated. A sperm fuses to an egg and releases its RNA inside her cell walls.
Postman: Hello? I need you to sign!
He looks in through the window. Jake nearly flattens his sister, scraping her womb with his dick as he finishes off his orgasm. The postman finally goes away. Jake pulls out and cum pours onto the couch.
Kelsei: Oh no, it’s so much sperm! It’s really deep inside of me! What am I gonna do?!
Jake: Oh shit, I am so sorry! I thought the hairband was gonna work!
Kelsei: I told you not to cum inside of me!
Jake: Wait, let me check mom’s medicine cabinet!
Kelsei: Do you really think she has plan b?
Jake: Found it! “For extra fertile ovulation.” That’s you! It’s expired so take three.
Kelsei: I’m taking five!
The bottle shows a heavily pregnant woman with a massive grin.
Kelsei: I don’t want that to happen!
Kelsei chews the pills.
Kelsei: Since we found the pills, guess we could keep going.
Jake: Yeah, I think you took enough.
Kelsei: Maybe one more? These things make me feel really good.
Jake slides his cock into her cum filled pussy and shoves it back inside her womb. They make love on the couch for hours.
Kelsei: I’m gonna cum!
Jake: Me too!
Kelsei: Don’t let it spill on the couch again!
Jake throbs madly into her pussy. Her womb stretches with cum. Eggs drip from her ovaries and are instantly attacked. Her limbs seize up and a fever hits her as she is impregnated again. Her ovaries continue their rapid production of fertile eggs.
Jake: God this feels so good! Good thing these pills are maximum strength!
Kelsei: I do NOT want to get pregnant!
Jake: Heh, what if instead of “For extra fertile ovulation” it was ““For”” extra fertile ovulation?”
Kelsei: Hehe! That would be hilariously bad. I think I took enough for the whole week, so…
Kelsei hooks her brother in with her ankles. He penetrates her flooded pussy again.
Jake: Dammit, it’s sensitive!
Kelsei: Jake, it feels so good! These pills are making me horny. I think I overdosed. You gotta help me burn through them!
Jake: Always something with you!
He rails his sister into the evening.
Jake: Mom’s gonna be home soon.
Kelsei: Just one more time!
Jake empties his balls in his sister. His cock is raw and sensitive and the sperm is freshly made. Her womb stretches under the pressure. His mind goes blank and his vision fades as his cock shoots off.
Kelsei: My pussy is so fucking full!
She rubs her fertile, pregnant belly, full of her brother’s sperm.
Kelsei: I really hope the pills works!
Another egg gets stabbed and the sensation ripples through her body. A wave of pleasure crashes inside of her. Then their mom opens the door.
Mom: Hi guys! I’m back from my business trip! What’s that smell?
Kelsei throws the towel over her like an apron. Continuing to bounce on her brother’s dick as their mom walks in. Jake hides his lower half behind his sister.
Mom: What are you guys doing?
Kelsei: Just exercising, mom!
Mom: Do you have to do it on top of your brother?
Kelsei: Oh yeah, it totally annoys him.
Jake: Would you get off?!
Kelsei: Hehe! I don’t think so!
Mom: Anyways, my business trip was so much fun! I got to meet a ton of really tall and powerful people, who are all just so lovely. We really sealed the deal, if you catch my drift. Oh there are my pills! Hey, it’s empty!
Kelsei: Sorry mom, I ran out of weed and I wanted to get high.
Mom: Oh these will get you high alright. You took the whole bottle?!
Kelsei: Well, they’re expired and I didn’t feel anything at first.
Mom: Well, I guess you know what they do then. Too bad you don’t have a boyfriend!
Kelsei: They do kinda make me jittery.
Mom: That explains your weird exercise. It’s too bad you guys are brother and sister, what a waste.
Jake cannot hold back any longer and ejaculates inside his sister’s pussy mid conversation.
Kelsei: He’s helping me a little bit.
Mom: Oh that’s good. Maybe a cool compress on her forehead, making sure she doesn’t get overheated?
Jake: More like helping her burn through it.
Mom: Oh, maybe the exercise will help. Anyways, I’m gonna make dinner!
Their mom walks away.
Jake: Jesus, that was close!
Kelsei: I know! You can’t pull out yet, it’s gonna spill!
Kelsei reaches for her glass and finishes her water, then pulls out her brother’s thirteen inch cock. Cum pours into the glass.
Kelsei: Oh shit!
Jake hands her his empty cup. Both get filled.
Kelsei: It’s still coming out!
Jake stuffs her pussy with his cock while she drinks down one cup half way.
Kelsei: Gah! This is nasty!
Jake: I ain’t helping!
Kelsei takes several big swigs and finishes the glass, then starts the second one. Watching his sister drink his cum makes him rock hard. He starts thrusting and Kelsei tries not to spill. Jake watches his sister’s throat bounce and erupts. She chugs the second glass as her pussy gets filled. Then she lifts off and fills another glass and a half.
Mom: Dinner time!
Kelsei: I kinda had a big lunch!
She chugs cum as quick as she can, then rubs her fat belly.
Mom: What about you, Jake?
Jake: I could eat.
Jake wraps the towel around him and sits at the dinner table.
Mom: What’s with the towel?
Jake: It got really hot, I had to get rid of my tight clothing.
Mom: Oh, alright.
Jake feels something touch his leg. It’s his sister. His cock is in her mouth a moment later.
Mom: So what have you been up to while I was gone?
Jake: Just watching TV.
Mom: Oh, what did you watch?
Jake: I can’t remember.
Mom: Huh.
Jake stuffs his mouth while Kelsei stuffs hers.
Mom: I need you to keep an eye on Kelsei tonight, make sure she doesn’t sneak out.
Jake: You want me to sleep in the same room as her?
Mom: In the same bed, if you can. You’ll know if she moves in her sleep.
Jake erupts in his sister’s mouth at the dinner table. Their mom is clueless.
Mom: Kelsei?
No answer.
Jake: Maybe she’s in her room.
Mom: I better go check.
Kelsei swallows every drop and emerges from under the table. Their mom returns.
Mom: There you are! I want your brother to make sure nothing bad happens to you tonight. Those pills might make you sleepwalk, and you’ll wake up pregnant!
Kelsei: Oh no! That would be bad!
She rubs her bloated and already impregnated belly.
Kelsei: What would we do if that happened?
Mom: Oh that would be terrible, unless it happens to me. Then it’s a blessing. The perfect end to my wonderful business trip.
Kelsei: Ok, well I’m gonna go to bed now!
Mom: Jake, you better go!
Her bed is jumping a moment later.
Kelsei: You’re so fucking deep!
Jake: I can’t stop!
Jake breeds his sister again, making a mess of her mattress. Her pussy strangles his cock as she climaxes around him, milking out every drop. A ripe, fresh egg falls from her ovary into an ocean of sperm, joining the already developing embryos inside her. Sperm attacks its shell, then one is chosen. New DNA is formed.
Kelsei: Fuck!
Jake: We have to keep going!
They breed the entire night. By morning, a dozen embryos swirl inside of her, waiting to be implanted.
Kelsei: Mom? I think I might have sleepwalked.
Mom: What?
Kelsei: It feels really full and sticky, down there.
Kelsei shows off her inflated belly after a night of hard fucking. Jake looks guilty.
Mom: Jake, I told you!
Jake: I did, but then I fell asleep!
Mom: The father could be anyone!
Kelsei: I’m sorry!
Jake: It’s my fault.
Mom: You two are in so much trouble! Go to your room!
The two head back to Kelsei’s room, and are instantly locked to each other.
Kelsei: Mom is really mad!
Jake: We’re in so much trouble!
Their mom busts open the door.
Mom: I knew it!
She catches them, full penetration and all.
Jake: No! Mom! It’s not what you think!
Kelsei: He’s just helping me!
Mom: Helping you what, become a slut?!
Kelsei: Mom, don’t say that! It got hot and I need the fan to blow inside of me, and he helped widen me out. But then it kinda got out of hand.
Mom: You know, my parents made me smoke a whole carton of cigarettes when they caught me smoking, I’m gonna do something very similar! You want fertility pills? You got it! You want your brother’s incest babies? No problem!
Kelsei: Mom, no!
Mom: This is for your own good! I am making you carry your brother’s babies to term! This is your punishment! I don’t want the two of you separated for a whole week! I’m calling your principal and telling him you’re both sick!
Jake cums inside his sister again as he’s being punished.
Kelsei: Mom, he’s really gonna get me pregnant!
Mom: Good! Maybe you’ll learn something!
Jake: I’m sorry, sis. I can’t help it!
Sperm swirls inside her as her womb trembles.
Kelsei: Mom, my womb really hurts! There’s so much inside of me!
Mom: Oh, it’s gonna hurt a lot more than that when you give birth! Believe me!
Jake: We can still try to miscarry.
Mom: Fat chance! Those pills are guaranteed pregnancy! Serves you right!
Kelsei: Oh no! I’m gonna get pregnant!
Mom: You’re probably already pregnant! Don’t let that stop you!
Kelsei: Mom, I’m sorry!
Kelsei cries as she cums. Her system is exhausted.
Mom: Let me get you more pills. You better not spit them out!
Kelsei takes a small handful and swallows it dry.
Kelsei: I don’t want to get pregnant!
Mom: And smokers don’t want to get cancer!
The mom looks at her son’s cock deeply penetrating her daughter when it lets off. His urethra pulses before her. Pumping Kelsei with even more cum.
Mom: Keep pumping into her. Get her knocked up!
Jake: Mom, I can’t!
Mom: Let me get you some pills too!
A moment later, his erection stiffens and Kelsei bounces on his dick.
Mom: You’re gonna fuck until your dick falls off!
Kelsei’s ovaries assemble new eggs. Jake’s balls produce more sperm. They go at it for hours. There is a pool of sperm on the floor. Finally, they gather the courage to leave their room.
Kelsei: Mom, can we get something to eat?
Mom: Oh no! You two are not to be separated! Come here.
She ties a belt around them, face to face. Jake sits at the table, impaling his sister.
Mom: Here’s your dinner. This’ll help increase your sperm count.
Kelsei: What do I get?
Mom: Do you want more pills? I see your belly stuffed, you’re not going hungry! You get to eat the cum that spills out of you!
Jake erupts inside his sister and finds little satisfaction. The pills drive him mad and he barely eats. Their mom watches in disbelief. Kelsei collects spilled sperm with her hand and licks it. The mom bites her lower lip, realizing this might be the hottest thing she’s ever seen.
Mom: Guys, I just realized I need to go on another business trip. You two are to stay grounded until I return!
One minute later, their mom is out the door, never to return. The power gets shut off and they steal their neighbor's water. Jake starts a potato farm, but Kelsei lives off his semen. They wait for the house to get repossessed, but it never happens. Kelsei’s belly grows to an enormous size over the next few months.
Jake: I don’t think mom is coming back.
Kelsei: It’s gonna be just us, and our babies. What are we gonna do?!
Jake: We have to give them up for adoption, right?
Kelsei: I guess so.
The ten-month mark comes and Kelsei gives birth in the bathtub to five babies. Many miscarried.
Jake: Oh, they’re so cute!
Kelsei: They’re perfect! Maybe we can keep them?
Jake: We can try it for a bit, see how it goes.
Kelsei: You know, we are still grounded.
Jake: Oh no!
Kelsei: Uh huh! You better not cum inside me this time!
Jake is railing his sister next to their crying newborns.
Jake: I don’t know how long I can last!
Kelsei: Careful, I’m fertile again!
Jake: Oh god, don’t say that!
Kelsei: I could get pregnant again!
Jake: Another five incest babies?
Kelsei: We can beat that! That was just the warm up!
Jake: I dunno if I should!
Kelsei: It would be really bad! Knocked up by my brother again?! Hehe! That would be so much fun!
Jake: Fuck it.
Jake releases his pent up sperm inside his fertile sister.
Kelsei: Oh my god! You’re cumming inside of me! I’m gonna get pregnant AGAIN!
Jake: Oh shit! What am I doing?!
Kelsei: Hehe! This is so much fun!
Years pass and babies continually spill on the floor. The house is noisy and messy. Kelsei is always pregnant. They take to gardening quickly, and live self-sustained for decades, sticking their neighbor with the water bill.