Alien Family Parasites - Cover

Alien Family Parasites

Copyright© 2025 by Syntheticincest

Chapter 1

Incest Sex Story: Chapter 1 - Outcast aliens infect hot human families with parasites so they can mutate them taking over their minds and bodies to engage in incest.

Caution: This Incest Sex Story contains strong sexual content, including Mind Control   Science Fiction   Aliens   Paranormal   Incest   Mother   Son   Brother   Sister   Father   Daughter   Group Sex   White Female   Oriental Male   Oriental Female   Cream Pie   Facial  

“I got a weird text today,” Riley says to her best friend, Kyla, shutting her locker door after cheerleading practice. The pretty, curvaceous blonde teenager has curved lips giving her the appearance of smiling about something secret.

“Did it say something like, ‘you and your family have been selected to beta test our ‘I’ program,’ or something,” Kyla comments, “and then your phone buzzed weird and there was a noise kinda’ like a fly buzzing by your ear that you can’t see?” Kyla is a shapely brunette with dark eyes and a mouth shaped in a downturn frown that matches her sassy attitude.

“Exactly. Then I just blocked it,” Riley says, putting on her backpack. “Freaking spam!”

“My dad’s picking me up. Wanna ride home?” Kyla asks as they exit the school.

“Where’s Caleb, the dependable boyfriend?” Riley smiles.

“He’s helping his mom grade papers,” Kyla says. “Oh yeah, Caleb said he and his mom got the same text, too. He’s gonna miss my hand on the way home.”

“Shut up,” Riley giggles.

They exit the school and Kyla walks toward her dad’s BMW at the curb.

“Do you wanna ride home?” Kyla asks again.

“No thanks, it’s so nice out, I just wanna walk,” Riley says.

“Cool. Text you later,” Kyla says.

“Not if I text you first,” Riley smiles.

Riley watches her best friend head to the BMW and waves to her DILF dad, Liam. Liam is one of those middle-aged successful men who looks hot, being as bald as he is. He is always well-dressed and has a short, trimmed, full beard. Just before Kyla gets to the car, she stops and stares at her dad, who sits staring at her. Both of them have a strange smile etched on their faces. What are they doing?

Kyla gets in the car smiling and Riley watches in shock as Riley presses her open mouth over Liam’s as they kiss like hard and hungry lovers. They look at Riley and lick tongues. Enjoying her discomfort and fascination. Riley looks around but the school grounds are almost deserted. She sees Kyla begin rubbing her father’s crotch as he fondles her breasts through her uniform.

Riley is transfixed watching Kyla’s arm movements indicating she is undoing her father’s pants. Her gorgeous teen face is a mask of animal lust as she glares at her father’s prodigious erection and pushes her mouth over the bloated glans.

Liam smiles watching Kyla and the car pulls away from the curb moving fast as Riley stands in shock not knowing if she should cry or call the police. This is insane. What could explain this complete transformation? Kyla and her dad would never do or think of doing something this horrific! There has to be an explanation! Incest! It’s so sick!

Riley begins walking home shivering. Incest. ‘I’. ‘I’ for incest. Fuck! No way! ‘you have been selected’. She turns and heads back to the school. Please, God. Please, God. Please, God. She heads to Caleb’s mom’s classroom. Deborah is a ginger MILF. Caleb is a jock.

The school is deserted. She listens outside the heavy door. Loud moans of a woman being sexually pleasured. Oh shit. Oh fuck. Oh shit. She opens the door just enough to peek inside. She stifles a gasp but the copulating mother and son are too involved making obscene noises. Deborah is bent over her desk as Caleb plows into her from behind. Her skirt is up around her waist, her blouse is open and her bra is unclasped. Her gorgeous face expresses deep human-animal pleasure as Caleb leans over her back fondling her meaty breasts, panting and grunting like a wild beast.

“Oh God, so fucking fucking good,” Deborah moans, humping and grinding her pussy against her sinewy son. “I love these fucking bodies! ooohhh!”

“Yeah, Mom! So easy to manipulate and their language is so fucking crude,” he says slapping her ass, “You love it don’t you, whore?!”

“Yes! Yes!” Her eyes roll up, “you’re making mommy fucking cum again!” She screams and cries out sharply.

Caleb grips her tits hard and his body tenses. “Take my fucking cum, Mom!” He grunts and gasps discharging powerfully into his mother’s cock-crammed sheath.

“Fuck yes! Yes! Jesus Christ!” Deborah sobs, spasming as orgasms rip through her body and brain.

No longer in complete shock Riley watches as Caleb and his mother lick tongues, panting in each other’s open mouths, glaring at each other with perverse lust. Caleb smiles and pulls out of his mother’s sheath and Riley marvels at the copious amount of commingled fuck fluids spilling out and the size of the bloated shaft.

That’s not him! That’s not his cock! Kyla would have told me if he was that huge! Caleb grins stepping over to his mother as she chuckles and opens her mouth, kissing, licking, and sucking on the greasy bloated glans, still bent over the desk as Caleb strokes the meaty shaft.

“I’ve got some left for you, Mom,” he groans, grimacing. Several powerful streams of teen jizz spray on his mother’s face as she yelps with surprised delight, dripping and drooling on her tits and nipples.

“Let’s clean up and go home so we can fuck all night,” Deborah chuckles sitting up. “These new bodies are perfect for our incestuous lusts”

Riley backs away, closing the door as the mother-son couple kiss with tongues.

‘These new bodies perfect for our incestuous lusts? Riley walks quickly down the hall. Outside the school, she takes deep breaths of fresh air. Am I corrupted, too? Infected? ‘ New bodies? Is this an alien invasion? Did something get out of a lab? What about my mom? My dad? My brother? Did they get the text, too? Where can I go? Where can I hide? Can I call someone? Who?

Riley’s hands shake as she calls Lara, her mom. Please, God. Please, God. Please, God. “Mom.” Breathe. “Did you get a weird text about an ‘I’ beta test today?”

“Why, yes I did. I just spammed it, why?”

“Have you noticed anything ... unusual in the neighborhood?” Riley asks.

“No ... you sound as if you’re stressing, honey,” Lara says. “Oh, your brother, Max, just came in from the U.”

Oh fuck! “Mom! Mom! Put your phone on speaker,” Riley says. Fuck! “Don’t look at him!”

“Riley! What on earth are you talking about?” Lara says on speaker. “Why are you acting like this?...”Hi, Max, how was cl-”

Silence. “Mom! Mom! Are you there?” She’s changing. They’re both changing. Shit. Fuck. She begins walking home faster. Too late. Too late. Too fucking late!

She hears her mother chuckling. Silence. More chuckling and a loud moan.

“Mom? Mom?” Fuck. Fuck. It’s happening to them...

“Oh God, Max,” Lara moans. “That feels so good! ooohhh! Oh my, God! I can’t believe this is happening ... oh!”

Max growls something, and the only clear words are, “Mom, ... something ... Mom.”

“Ooohhh! ... Fuck!” Lara gasps. “Ooohhh! Get that fucking cock inside me,” her voice sharp, demanding. “Fuck me! Fuck your mommy’s hot pussy!” She rarely swears.

“You want it, Mom?” Max’c voice clear, taunting. “You want your own son’s cock?”

“Yes! Yes!” Lara hisses. “Pound my pussy with that big cock! Oh, my God! I love these fucking new bodies!”

There is only the sound of Lara’s loud and constant moaning, Max’s loud grunting, and slapping flesh.

“Mom! Mom! Max!” Riley almost screams into the phone.

“Ooohhh, Riley it feels so fucking good,” Lara sobs. “You’re gonna love our new family relationships! God! Fuck!”

“Come on home, sis! We’re gonna get along better than fucking ever,” Max pants. “I’ll make you feel real fucking good, right, Mom?”

“Yes! Oh God, yes! I can’t stop fucking cumming,” Lara cries out.

“Ready for my cum, Mom?” Max grunts.

“Yes! Yes! Cum in my hot pussy, baby! Mommy needs all her baby’s hot fucking cum! ooohhh! Oh! Oh! Fuck!”

“Ah! Take it, you hot, blonde fucking bitch! Ah! Ah!”

Riley listens in shock and horror as her brother cums inside their mother and she howls in some animalistic triumph. She hears them talking in hushed tones and then her mother chuckles, “That sounds like a wonderful idea, honey!”

“We’ll see you later, sis,” Max says.

“Oh, we will,” her mother says with emphasis.

They break the connection.

There it is again, ‘I love these fucking new bodies’, ‘these new bodies... ‘. They’ve been taken over. Completely. In a matter of seconds, they go from being a normal family to incest freaks! And it’s inside me, too. Fuck. What about dad?

Riley calls her dad, Sam, at his office. “Dad ... did you get a weird text today?” I know he did.

“You mean about the ‘I’ beta thing?”

“Yeah.”

“Why?”

“It’s complicated, Dad. When are you coming home?”

“Well ... not for a while. I have one more client for today. Okay?”

Sighs. “Okay, Dad. I love you.”

“I love you, too, Riles.”

Riley cuts the call. Where can I go? Hide?

She walks slower as she gets to what used to be a ‘normal’ home. A car pulls up behind her.

“Hey, sis,” Max calls.

She turns without thinking and makes eye contact with Max and their mother in her electric car. Her eyes stare hard. Her body produces copious amounts of lube, soaking her panties and she experiences what Kyla, Deborah, and her mother felt: uncontrollable familial lust.

“Need a ride home, honey,” Lara chuckles and Riley sees her mother tugging on Max’s long, bloated cock. She licks her lips and scurries into the back seat of the car.

“That’s my baby girl,” Lara chuckles as she leans over the back seat, sucking hard on her brother’s cock as he drives.

Her eyes roll up as the first creamy drops ooze from the tip and on her tongue as he mother joins her, edging the throbbing shaft.

“It was my idea to sneak up on you so you wouldn’t think about running away,” Max grunts, pulling into the garage.

Riley is so incest cum hungry all she can do is suck on the bloated head as her mother jerks her son off in her daughter’s sucking mouth.

Lara groans, “Ooohhh! Yeah! Gulp that brother-cum down, Riles ... so fucking good...”She leans forward licking and tonguing the thick greasy sticky cum drooling down the meaty shaft, fondling the heavy balls.

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