Alien Porn Tourism
Copyright© 2025 by mypenname3000
Chapter 36: Brother Turns His Busty Sis into a Porn Star Slut
Science Fiction Sex Story: Chapter 36: Brother Turns His Busty Sis into a Porn Star Slut - An alien comes to earth expecting life to be like our porn. When it's not, he uses his AI to reshape people to play the parts in live-action smut!
Caution: This Science Fiction Sex Story contains strong sexual content, including Ma/Fa Fa/Fa Mind Control Lesbian BiSexual Heterosexual Hermaphrodite Science Fiction Aliens Cheating Cuckold Slut Wife Wife Watching Incest Mother Son Brother Sister Father Daughter Gang Bang Group Sex Orgy Anal Sex Analingus Cream Pie Double Penetration Exhibitionism First Masturbation Oral Sex Sex Toys Tit-Fucking Voyeurism Water Sports Big Breasts
Note: This is a commissioned story. I don’t have much say over the events.
T. Ropex
“One more scenario before our time on Earth is over,” the AI reported.
I had paid for a certain time. It had flown by so much. “Then let’s make it a fun one.”
“I always strive to make it a fun one,” the AI said. “You will be invited to fill out a survey of your experience with me at the end. For now...”
Reality shifted, and I was in a living room with hardwood floors and a throw rug.
There was a young man lying on a couch, snoring. He was in his early twenties with a scruffy mustache he was trying to grow out and failing. He had a large jar of cheese puffs lying on his chest that rolled off and spilled all over the floor.
An annoyed huff drew my gaze to the kitchen, where a young woman in a pink top is aiming her phone at a plate of healthy food. She looked to be about to take a picture. She huffed, her brown hair styled, and her face made up. She was a slender thing in pink shorts that went with her tank top.
“Seriously,” she said as she stared at her plate. It looked like healthy food. She appeared a few years younger, eighteen or nineteen. “Seriously, you lazy slob!”
The young man on the couch snorted and kept snoring.
She snapped the pic and started furiously typing on her phone. I cocked my head, wondering what was going to happen between the pair of them. Then she stood and marched over to the sleeping young man. They had similar hair color, this warm brown.
Siblings.
Jennifer “Jen” Alderson
“Really!” I huffed as I stood over my slob of a brother. I wrinkled my nose. He hadn’t showered. “Get your lazy ass up!”
Kevin just snorted and blinked. He saw me and groaned. “Go away. Sleeping.”
“On the couch!” I hissed. “And your fucking disgusting cheese puffs spilled everywhere. You’re such a slob! Get up and clean up this mess. And get out of here.”
“My house, too,” Kevin muttered as he sat up. Cheese puffs rolled off his chest. His fingers, covered in the disgusting yellow dust, rubbed on the couch.
“Until Mom and Dad kick you out for being a lazy slob,” she muttered. “Just go back to your room! I’m trying to produce content.”
He glanced at the chicken and arugula salad I had made for lunch. “Who wants to see pics of dumb food?”
“My fans!” I huffed. “And they don’t need to see that I have a pig of a brother who eats Cheetos. Do you know what foul things are in there? And don’t get me started on the food dyes! That stuff is poisonous.”
He rolled his eyes, grabbed his phone, and started watching a video, leaning his head onto the armrest, his feet on the other. “I can be out here.”
“Why are you even out here?” I demanded. “You’re never out here! Just go back to your room and play your stupid video games.”
He shrugged and started watching a video.
I glared at him. “Don’t you dare watch one of those disgusting pornos out here! I mean it, Kevin.” “Porn?” He shot me this innocent look. “Why would you think that?”
“Everyone knows you’re a pathetic loser that no girl wants to touch, so you just spend all your time spanking it to porn!” I huffed, my anger boiling. “We can hear it! Disgusting! You’re a fucking little pervert with a small dick that can’t get any girl! That’s why you got to watch it!”
Anger swelled in him. He rose to his feet. “And you’re just an Instagram bimbo trying to get fucking guys to stare at your tits while you pose with your food. Not that you have any tits!”
I gasped at him. I had boobs. They weren’t very big, but... “I am not an Instagram bimbo! I’m a foodie! I don’t post sexy selfies of myself!”
“Then why are you wearing that tight top and those shorts?” he demanded. “You just want guys’ attention. Just a fucking THOT. A 304 looking for some attention. Shit, just open up an OnlyFans and show off those tits. Someone will pay for them. Always perverts out there like them small.”
“Like you and your teeny-bopper porn!” I huffed. “Fucking like them barely legal with no tits and shaved twats. Fucking disgusting pervert!”
“I like fucking huge tits!” I roared. “Big, heavy, fake titties that you can bury your face into. I don’t want to stare at your fucking flat chest! That’s why no one pays for your OnlyFans!”
“I don’t have an OnlyFans, you creeper!” I screeched. “With that pedostache you’re trying to grow! Get back to your room and jack yourself to death to whatever the fuck you want! Leave me alone! I have to film!”
“Attention-seeking whore who needs a fucking dick shoved up her ass so she’ll loosen up!” Kevin roared at me.
T. Ropex
“Adjusting the scenario!” the AI said.
The slender girl suddenly wasn’t so slender. She had huge tits that were spilling out of her pink tank top. Her shorts were even shorter, hugging her bubbly butt and leaving her thighs exposed. She had stripper heels on, giving shape to her calves and thighs. Her brown hair became blonde, her lips fuller, and her face made up like a porn star whore.
The brother looked shocked at the sudden change in his sister.
Jennifer “Jen” Alderson
“Then get your camera and film shoving your dick up my ass, Kevin!” I hissed. “I need content for my OnlyFans, and incest is going to fucking sell.”
Wait, wait, wait, wait! this stupid, panicked voice screamed in my mind. OnlyFans? Incest? Kevin sticking anything up my butt? Why did I just blurt that out?
Why not. I had OnlyFans content to film. If my brother was going to be out of his room, he might as well be useful. I put my hands on my hips, ignoring that stupid voice, and stared at my brother, my boobs jiggling.
“The fuck, Jen?” Kevin asked, blinking. “And ... You...” He looked so confused.
“You watch all that porn,” I purred. “Surely you know how to film some hardcore POV fucking. And you do know how to shove a dick into a girl’s asshole. You’re not watching gay shit, right? You’re watching big titty hotties getting railed, right? Well, rail me!”
That’s the most disgusting fucking thing I’ve ever said! the stupid voice whined. No, no, no, that’s not happening.
I pushed that voice down. It was happening. My brother looked shocked until ... Was he buffer than normal? He usually looked like a doughy punchbag, but ... No, no, he always had muscles and that thick mustache on his upper lip that made him look like a stud in a porno. A big-dick hunk.
“Well, are we going to do this?” I demanded. “Some brother-sister fucking! Get your camera. I know you have one for spying on Mrs. Brinkley when she’s topless sunbathing. My tits are bigger, better, and right here for you to play with!”
Kevin Alderson
I darted upstairs to my room, bemused.
That’s not my sister! She’s got tits. And her hair’s blonde! And she’s acting like an actual Instagram bimbo! A fucking OF 304.
But wasn’t Jen always a whore. Ever since she got those tit implants and dyed her hair, I thought she was doing something. Why I was hanging around the house. Trying to catch her in it. Maybe figure out her OF account so I could watch my sister doing things, but this...
I reached my bedroom and darted to my camera on my desk. I loved to film Mrs. Brinkley when she sunbathed topless. She was doing it right now, but there were some real fucking tits for me to enjoy downstairs.
I rushed downstairs to find my sister already setting up her smartphone in a rack with a light on it. Then she grabbed a second rack and had my phone in it to capture a different angle. She glanced at me coming down the stairs.
“The scene is, you’re mad at me, so you’re going to come down here, throw me off the couch, yank down my shirts, and fuck me in the ass,” she purred. “My fans love it when the girl’s fucked like an object! It’s the way women were meant to be used!”
What the fuck happened to my sister? that dumb voice asked. Dude, it did not matter. I was going to fuck the shit out of her.
She lay down on the couch. I backed up to the stairs and came down to her sleeping with her ass thrust off the side of the couch. She was on her side, facing the back of it. I aimed the camera at that bubbly butt clad in those hot pink short-shorts. My dick twitched hard.
“Look at that,” I said. “My fucking sister’s got an ass that’s just begging to be fucked and fucked hard. Damn!”
I stalked down the stairs, my dick aching hard. I smiled as I reached my sister’s rump. I licked my lips, wanting to just grab her and yank her off the couch. Which is just what I was going to do. My dick was so hard.
Ignoring the guy watching in the corner, I grabbed Jen and yanked her off the couch, throwing her to the floor. She gasped and bounced, rolling to a stop. Her bleached-blonde hair flew while her big boobs bounced.
“What the fuck, Kevin!” she screeched at me. “You fucking asshole! I was taking a nap!”
“Shut the fuck up, Jen!” I growled as she knelt there, glaring up at me. “You’ve been fucking walking around the house dressed like a fucking whore! You fucking need a dick. Good thing your big brother’s here for you!”
“Eww, gross, you creep!” She glared at me with such disgust. I hated that look. “I wouldn’t let you touch—”
I slapped her across the face. She gasped, her head whipping around. Her cheek grew red. Her hand flew to it, rubbing it. Tears shone in her eyes. I grinned at her and then grabbed her head. I yanked her around and shoved her face into the carpet.
“That’s how whores should be,” I growled. “Face down, ass up! Ready to be fucked! That’s what you need, Jen! Your big brother’s dick in your fucking asshole!”
I gripped her shorts with one hand, the other still holding the camera. I yanked down her shorts, revealing her perky ass. She had a nice, milky ass, her asshole winking brown at me. My dick was so hard. She squirmed there as I yanked her jeans down to her thighs to her knees.
The sweet aroma of her pussy filled my nose. Her shaved twat dripped with juices. The fucking whore was so wet for it. Just gagging for her big brother’s cock. She whimpered and wiggled her rump at me as I unfastened my jeans with one hand.
“You can’t do this!” she gasped. “I’m your sister! This is incest, you pig!”
CRACK!
She squealed as I spanked her ass. “Shut the fuck up, slut! You want this! You’ve been dying for my big dick. You want to be fucked by your big brother. Cock-teasing whore! That’s what my baby sister is! A horny fucking skank that wants it hard!” I ripped out my cock and flopped it down her butt-cheeks. It rested in her crack. “This is what you want!”
“As if!” she huffed.
I slid my cock down her crack, savoring the silky feel of her butt-cheeks on the crown of my dick. I nuzzled the tip past her taint to the juicy folds of her cunt. “Then why are you so wet, bitch?”
I thrust into her cunt.
“Holy fucking shit!” Jen gasped as my dick penetrated her pussy to the hilt. I groaned, savoring the warmth of her silky snatch. I had my sister’s taboo twat around me. This was real incest. It was incredible. This wasn’t my hand. “Fuck, fuck, fuck, Kevin! You’re in my cunt!”
“Yep!” I growled. “Got to lube up for that ass. Shit, you’re soaking wet. See.” I pulled out my cock to film how much my dick gleamed from her pussy. “I can’t believe it. You are one fucking dirty whore.”
I pulled my cock out and pressed my cock between her butt-cheeks. I slid into her asshole and found her backdoor. She whimpered as I drilled against her anal ring. I pushed and pushed on her backdoor, so eager to bugger her.
“You stop this right the fuck now!” she moaned.
“Why? I asked, her anal ring widening and widening to swallow my dick. “You fucking want it, whore! You’re just a dirty slut aching for her big brother to ram his dick up your ass! So ... Take it!”
I thrust hard.
She squealed as her asshole widened. Her velvety bowels engulfed my dick. I groaned as I sank into her hot flesh. She felt so amazing around my dick. I groaned as I sank into her. It was so amazing to penetrate into her bowels.
I groaned as I penetrated further and further into her bowels. It was just a wonderful sensation to have her velvety heat engulf my cock. The incestuous rush of buggering my little sister swept through me. The bitch moaned as I bottomed out in her.
“Holy fucking shit, Kevin!” Jen gasped. “You’re ... That’s ... Holy fuck!”
“Such a whore!” I growled, holding the camera to record my cock buried to the hilt in her bowels. “You fucking love it!”
“Yes!” she squealed. “I mean ... I ... You ... Asshole!”
I chuckled at her confession and drew back my cock. She squeezed her bowels down on me. I loved how she felt around my dick. I pulled back more and more, enjoying every inch of that tight anal sheath around me. She massaged me with her velvety heat.
I smiled and buried back into her bowels. It was so good to fill her up with my thick shaft. My nuts slapped into her taint. I loved feeling velvety heat around me. It was such a stimulating moment. I groaned, thrusting away at her.
“Kevin!” she moaned.
“Whore!” I growled, fucking her hard. “You fucking love it!”
“I ... I...” She squeezed her asshole down on me. “You big-dick asshole! Oh, my god! Fuck me, dick! Fuck me with that dick! Shit!”
I pounded my sister hard and fast. My nuts slapped into her taint over and over again. I reveled in the forbidden heat of her velvety bowels around my cock. My shaft pistoned in and out of her backdoor. It was an incredible rush.
I loved every second of fucking into her. I pounded her with all that I had. I loved burying into her hard. Fast. I slammed into her snatch. I groaned, churning her up with my dick. It was just amazing to pound into her with such force.
I hammered her with all that I had. It was just so good to fuck her.
“Yes, yes, yes!” I groaned. “Take it, whore! Goddamn, that’s good!”
“It is, dick!” she moaned. “Fuck, fuck, asshole! Pound my asshole! Make me cum!”
I grinned, filming my cock pumping in and out of her bowels. She moaned, her face pressed into the carpet. I loved fucking her hard like this. It was just so good. My nuts slapped into her taint as they swelled with the pressure of my cum.
I would dump my load into my sister’s asshole. I loved this so much. I pounded her as she moaned, her face rubbing into the throw rug on our parents’ hardwood floors. They were out of town for the weekend. We had the house all to ourselves.
Damn, that meant I could fuck this bitch so hard all day today and tomorrow.
“Shit, shit, shit!” I growled, fucking her hard. “Take it, whore!”
“Kevin!” she gasped, her asshole clamping down on my cock. “Dick! Yes, yes, fuck me with that dick! I’m going to cum. I’m going to ... Shit!”
Her asshole spasmed around my cock.
I groaned as I enjoyed her anal sheath spasming around my dick. She felt incredible. I loved every second of her wonderful bowels spasming around my dick. It was so awesome. She nursed at me with passion as I pumped away at her.
“Yes!” I growled, burying into her bowels. “Holy fucking shit, yes!”
I erupted.
I spurted blast after blast of my spunk into her writhing asshole. She convulsed about me. It was so good to feel her rippling about my cock. I loved this so much. It was incredible to have her writhing around me. I growled, dumping my load into my sister’s bowels.
“Yes, yes, yes!” she moaned, rubbing her face into the throw rug. “You’re cumming in my asshole!”
“I fucking am!” I growled, flooding my sister’s spasming bowels with my seed. “Shit!”
I erupted again and again, spurting more and more of my cum into her anal sheath. It was an incredible rush to have that delight spurting into her twat. She rippled around my bowels. I grunted, dumping it all into her.
My nuts twitched against her taint. I groaned, feeling so good right now. It was just a fantastic rush to have all that cum in her. I felt something else. I grinned at the cameras filming her, this idea shooting through me.
T. Ropex
The young man grinned at the camera after he finished cumming in his sister’s asshole.
I cocked my head, curious.
“He is about to do one of your favorite kinks to watch,” the AI answered.
I smiled in delight.
Jennifer “Jen” Alderson
I shuddered through my orgasm. My big brother’s cock was still buried into me. Who knew that Kevin was so hung. He felt incredible in my asshole. I could just make incest porn with him for my OnlyFans for the rest of my life.
“Jen,” he groaned, his hands tightening. “You are such a fucking whore! You deserve this!”
Deserve? I was so confused.
Then my eyes bulged as something hot streamed into my asshole. He pulled his cock back as he was...
“Are you pissing in my asshole!” I screeched as I felt his urine filling up my bowels, swirling with the cum. “You fucking dick!”
“I am!” he groaned. “Shit, that’s nice!”
“Fucking asshole!” I gasped as my bowels filled up with his piss. A urine enema.
More and more of the piss streamed into me. I gasped in shock as he dumped it all into me. I gasped as he filled me up with the urine. I couldn’t take much more of it. I felt so inflated by all that piss. I whimpered.
“Shit,” he growled, firing a few more spurts of piss into my asshole. “That’s so hot. Okay, here we go!”
He ripped his cock out of my asshole and leaped to the side.
“Fuck!” I gasped as the urine squirted from my asshole and splashed on the hardwood floor on the other side of the carpet. “You dick!”
More jetted from my asshole before running hot over my pussy and down my thighs. The acrid scent of urine filled the air. He laughed, filming it all. My cheeks burned with humiliation right now. The piss dripped out of my backdoor. A wet spot formed around my knees as I ruined the throw rug.
“You fucking prick!” I gasped. “You can’t just do that!”
“I did,” he said, sounding so pleased with himself. “You wanted to be an OF whore! Well, you’re going to be fucking remembered for this!”
He grabbed my hair. I gasped as he yanked me around and dragged me to the puddle of his piss on the hardwood floor. He shoved my face down into the bitter liquid. The acrid taste of his urine soaked through my lips.
“Clean up the mess, Jen,” he said, rubbing my face into it.
The urine coated my cheeks. More dripped down my thighs. I whimpered and licked across the floor, tasting the wax and the acrid piss. The humiliating flavors washed through me as I licked again, my cunt on fire.
The piss dribbled over my cuntlips as I licked up the urine off the floor. I slurped up a puddle of it, shuddering at the bitter flavor of my brother’s pee. I was such a whore, and he was filming it all with that camera.
“What a fucking whore, guys,” said Kevin. “My sister is a fucking slut! You guys are going to jack it so hard to this. Man, I am going to use her! You’ll see!”
I shuddered at his words. He was right. I was going to blow up. So many guys would jack off to me licking my brother’s piss off the floor after he urinated in my asshole. I whimpered as I licked through the groove between slats of wood, gathering it all up.
“Good enough,” he growled and grabbed my blonde hair. He yanked me up. “Get that top off! Let’s see those tits, Jen!”
I smiled and ripped off my top, baring my big, fake tits. I had spent my first OF check on them. They were so big and perky. I was no longer a B cup but an F. My nipples were hard, each pierced by golden rings.