Co-Written by Jss2141

Hayley tapped her fingers impatiently against the steering wheel, staring out at the endless line of cars ahead. The traffic was unbearable, and she couldn't help but sigh loudly.

"This is ridiculous" she muttered, eyes glued to the red brake lights ahead. "Why traffic now of all times?"

Beside her, Steve seemed completely unbothered by the situation. He stretched lazily, his arms high above his head, letting out a yawn. His pajama pants were slung low on his hips, and Hayley briefly glanced over at him, wondering what ridiculous thing he was about to do.

Without warning, Steve lifted his legs and kicked them up onto the dashboard, making himself at home in the most awkward, and uncomfortable, way possible. But it didn't stop there. With an almost casual flick of his wrist, Steve yanked off his pajama pants entirely and tossed them over the side of the seat, leaving him in nothing but his shirt and underwear.

"Steve? What are you doing?"

Steve didn't answer immediately. Instead, he removed his underwear as well revealing what could only be described as a flaccid forearm-length penis with large pent up at quickly prompted Hayley's eyes to widen as she stared at the absurd girty and lengthy thing that pulsed each second, still struggling to process what she was seeing.

Steve, clearly not noticing her shock, grinned. "I figured if we're stuck here, I might as well make the most of it." He adjusted his grip on his dick and started jerking off, but his member was just so big he neeed both hands to make sure he could do it.

'Oh…my…god.' Hayley thought in shock and slight awe, trying not to stare at the GIANT dick attached to her little brother.

As Steve fiddled with his "weapon" Hayley shook her head, still trying to process the scene. She wanted to tell him to stop, to make him put everything away and act like a normal person. But at the same time, she couldn't help but feel a little...intrigued? She glanced at it again. No. There was no way she could be intrigued by something like that.

Hayley tried to focus on the road, ignoring the ridiculous noises coming from beside her. Steve was giggling, making weird little groans of satisfaction as he jerked off over and over again, in satisfaction on the back of the car, she couldn't believe how casual he was about this he was completely unbothered by the situation, like it was just another Tuesday, sure she made him think it was a lucid dream but still.

"Steve, what are you doing?" She knew what he was doing but had to act silly.

"Oh this? This is just a little self help I call, "Taming the beast." I need to do this daily or else it causes rather BIG problems, if you know what I mean." Steve said with a grin.

"Yeah I know how it is" She said trying to sound calm "But maybe you should not do that right now? Because we are in the middle o-"

Though the more she talked the faster Steve jerked off and soon? Her answer Came in the shape of a thick stream of white that blasted out hitting the back of Hayley's head with an unexpected force after her brother let out a loud moan. The sticky, creamy substance splattered into her hair, instantly making her hair feel like a gooey mess.

"Oh~Fuck yeah! Take that load!" Steve's voice was filled with self-satisfied joy, as if he had just scored a victory in some strange game.

Hayley sat there, shocked. Her mouth dropped open, and she felt the sticky residue of cum drip down her neck, her hands gripping the wheel tighter. Her brother just bust a fat nut all over her hair? That did happen.

"Oh…my…god…" Hayley said slowly with wide eyes.

"Yeah, pretty big load huh?" Steve asked with a smug expression.

"Steve!" She yelled, trying to swat the air around her as if she could somehow escape the sticky situation.

She could hear his laughter behind her, the sound of it both ridiculous and contagious. Steve, now leaning forward, pressed the massive phallus against her cheek like it was some kind of weaponized joke. He had the biggest grin on his face.

"Park the car, Hayley," he said, his voice low but playful "Let's have some fun"

"P-Park it?" Hayley stuttered out.

"Yep. Forget school, I just found a much better way to spend the rest of this day and it involves spending it with YOU." Steve said with a grin.

Hayley's grip on the steering wheel tightened, her fingers turning white as she struggled to process what had just happened. Her hair, now plastered with a ridiculous mixture of peanut butter and jelly, felt sticky and heavy. She had never been so caught off guard in her life.

Her brain screamed at her to put her foot down, to tell him no. She should have been furious, but something inside her stopped her from speaking. She didn't understand it. She knew this wasn't normal, this was completely insane.

She could easily tell herself it was just some ridiculous dream. It would've been the perfect excuse. She could've simply said, "This was a prank" and ended it all. But for some reason, the words didn't come. Every time she opened her mouth, they got stuck somewhere deep inside her.

A strange curiosity started to creep into her mind. Maybe it was the way Steve had this completely unshakable confidence right now, like he was in complete control of the situation. Maybe that's what made it so hard to refuse. Or maybe, just maybe, Hayley was too curious to see just how far he would go

"O-Okay." Hayley let out with a meep, turning back to the road and driving down an alley to give them some privacy.

Her foot slowly eased off the brake, and before she knew it, she found herself turning the wheel, easing the car to the side of the road. The thought that she was about to park the car, as ridiculous as it seemed, still made her heart race, but it felt... oddly inevitable.

She couldn't explain why, but as she parked the car and turned the engine off, she glanced over at Steve, who was still clutching his massive boner with that mischievous smile. The air in the car felt thick with anticipation, and Hayley, for reasons she couldn't quite understand, couldn't bring herself to back out now.

Hayley's heart pounded in her chest as she parked the car in a deserted area. Her palms were sweaty, and she couldn't shake the feeling that something had shifted, something she couldn't put into words. The air in the car felt charged, the weight of Steve's eyes on her making her fidget in her seat.

Steve, leaning back with an exaggerated stretch, watched her carefully. His grin hadn't faltered, and Hayley could tell he was having way too much fun with this. She swallowed hard, trying to ignore the pounding in her ears.

"Well, what are you waiting for, Hayley? Hope to be back here." Steve said.

Hayley blinked, not sure if she had heard him correctly. She turned to look at him, but the moment their eyes met, she felt a strange flutter of nervousness in her stomach.

"What... what are you talking about?" She managed to stammer, her voice coming out shakier than she'd intended. She wasn't sure why, but her skin tingled with an odd mix of dread and something else she couldn't quite identify.

Steve's grin only widened, and he leaned in a little closer "You know, there's so much stuff I've been wanting to do with you. Things I've been thinking about for a while now"

Hayley's breath caught in her throat. She couldn't tell if she was misinterpreting his words or if the weird vibe she was feeling was all in her head, but she couldn't help the nervous gulp that came from deep in her throat. It did not help she kept looking at his hard member through the car mirror each time.

"Wh-What?" She sputtered, unable to hide the nervousness creeping into her voice. "What kind of stuff, Steve?"

He only laughed, leaning back again with his hands behind his head, completely unbothered. "Oh, you know," he said, as if the words were the most normal thing in the world. "We could do stuff we never get to do because you're always busy with school and stuff. I thought this could be a nice chance for us to...bond"

Hayley didn't know what to say. The words sounded innocent enough, but the way Steve was saying them, the playful glint in his eyes it all felt off. She felt like she was sinking deeper into a situation that didn't make sense, but somehow she couldn't pull herself out of it. Her throat felt dry, and for a second, she wondered if she could just drive away, forget about the weirdness of the moment. But she didn't.

"O-Okay. L-Let's bond." Hayley let out, undoing her seatbelt and climbing into the back of the car.

As she opened the car door and stepped out, Steve whistled loudly from the backseat, a goofy grin on his face. "Daaaamn, Hayley! You sure have some thick hips and a dumptruck ass!"

Hayley froze mid-step, heat rushing to her face. Her first instinct was to tell him to shut up, to call him out for being ridiculous, but Steve's laughter rang in the air as he continued. "Must be all those snacks you've been devouring. Looks like it's going straight to your hips!"

She felt herself tense, a mix of frustration and embarrassment swirling inside. It wasn't the first time Steve had poked fun at her for her eating habits, but this felt different. There was an almost playful mocking in his tone, and though part of her wanted to retort, she didn't quite know how to respond. Something about the absurdity of it made her hesitate.

"Shut up, Steve," she muttered, her face flushed.

As Hayley settled into the backseat, Steve's grin widened impossibly further. He shifted, making room for her, but not enough that they weren't practically touching. The confined space of the car suddenly felt even smaller.

"Damn! It feels so unreal up close!" Steve said, reaching over to her ass.

Hayley felt her heart race as Steve's hand made contact with her big booty. She tried to stay calm, telling herself it was just a joke, but the sincerity in his eyes as he looked at her made her doubt that. His fingers lingered on her hip for a moment, sending shivers down her spine.

"Uh, Steve," she stuttered, her voice barely above a whisper. "This is bonding?"

Steve's grin widened, if anything, making the situation even more nerve-wracking for Hayley. He leaned in closer, his breath hot and heavy against her ear as he whispered, "Oh yeah, we are gonna bond so hard"

'Oh god! Why does he sound so confident and alluring right now?! Why is this happening to my body?!' Hayley thought, beginning to breath heavier and heavier the longer this "dream" was going on.

"Now I see how you kept looking at my dick before, like what you see?" He asked, his large member poking her like a snake as he leaned back against the door. The old leather of the seat creaked under his weight. He puffed out his chest and smirked "Everyone knows Jeff has a small dick and a girl with a huge booty like yours needs some serious dick" His eyes glanced at her butt, and one side of his mouth pulled up into a dirty smirk.

"H-He manages. It's n-not about the size, it's how you use it." Hayley said with a stutter.

"Austin Power's dad was a fucking idiot and you know it." Steve said.

He then gets closer to her, at kissing distances "You know, I can show you a world where your husband could not"

Hayley gasped, not believing her brother was flirting with her like this. But then again, she noticed how different he was acting, almost like he was in a lucid dream. A thought crossed her mind, and she couldn't deny the way her body was responding to him. Maybe, just maybe, she could take advantage of this. After all, it was just a dream, right?

"Really?" Hayley asked, accepting this slowly as she leaned closer to him.

"Most definitely"

His hand moved from her shoulder to her waist as he pulled her even closer. Their faces were mere inches apart, their breaths mingled together as they gazed into each other's eyes.

Their lips met in a heated kiss, and Hayley felt all sense of rationality disappear. All that mattered in that moment was the intense desire she felt for her brother and the pleasure he was giving her with his skilled hands and lips, which she had no idea he had.

Hayley moaned against Steve's mouth as his lips trailed down to her neck, leaving hot trails of kisses along the way, and hands roamed around her hips.

"Fuck...this feels so good" Steve groaned as he lifted Hayley's shirt over her head before trailing kisses down her exposed chest. She arched into him, silently begging for more as his hands cupped her breasts through the fabric of her bra.

"Aaaah! AAAAAH! Fuck! That feels so good!" Hayley moaned out, moving closer so Steve could feel her breast more. "Jeff could never feel them up like you could!"

"That's because you married a pussy that was easy to control Hayley, but not me. I know you want the hand of a strong man"

Steve's hand moved lower, teasing the waistband of her pants before taking them off to reveal her large booty that he had been admiring earlier. He let out a low whistle, his eyes filled with desire. Hayley couldn't believe how incredibly turned on she was by Steve's touch. This wasn't supposed to feel this good , it was wrong on so many levels but she couldn't bring herself to stop.

"Damn, just look at this big ol' caboose! I bet every girl in your college classes was jealous of this thing." Steve said before giving one side a slap!

"OOOH! Oooooh, someone is a little rough already, huh?" Hayley said with a small huff, liking the sudden spanking.

"Jesus Christ, you got a whole bakery here"

Hayley giggled, feeling a sense of lightness and freedom that she had never felt before "Why don't you slap it then?" She said with a wiggle to her hips.

Steve's eyes darkened with desire as he stood up and pulled her onto his lap. He gave her a playful wink before bringing his hand down on her large booty, making a loud slapping sound.

Hayley let out a moan, feeling a rush of pleasure shoot through her body. This was unlike anything she had ever experienced before, and she loved every moment of it.

'Oh god, am I getting off by how wrong this is?!' Hayley thought as she moaned again, moving closer to Steve as he kept spanking her fat ass! 'Fuck, who cares if it's wrong?! I want it! I NEED it! I need Steve now!'

Steve continued to spank her, each one harder than the last. Hayley's skin would totally have turned into a shade of pink under his touch if she took her pants off, but she didn't care. She was lost in the sensations he was giving her.

"Harder" she begged, feeling the need for more.

"Louder." Steve said, putting his fingers in her pants.

"Harder!" Hayley said, louder than before.

"Louder! I want you to SCREAM for me!" Steve said before forcing Hayley's pants off!

"SLAP MY PHAT ASS WITH YOUR STRONG HAND! DO IT! DO IT HARD!" Hayley screamed as she basically wiggled her ass to him while at it.

"That's it! That's what I wanted to hear!" Steve shouted before doing as she wished, SLAPPING her ass as hard as he could!

"AHHH FUCK!" She bit her lower lip and she almost came from that.

"Yeah that's right bitch, i'm gonna need that phat ass to be against my face real soon" Steve smiled widely.

"Against your face? I don't think I'll last long if you do that!" Hayley said, mainly because she just wanted Steve to fuck her already.

"Do you have any idea how much I wanted this ass? Watching you walk around the living room with this dumptruck stuck on those pants, I want to enjoy this to the fullest"

Steve caressed the wide load gently, licking his lips in anticipation.

"You don't know how HAPPY I was when Roger lied to me about being adopted. I wanted to do more than just kiss you right at that moment." Steve said.

Hayley sees how much his dick is throbbing at the moment, almost as if it was alive and it would jump her at any moment.

"W-Well…you can do it to me now, if you want. I certainly won't stop you." Hayley said, gulping in anticipation.

"No, I want you to do it for me sis. I want you to wiggle all that BACKMEAT at my face, throw it back, twerk it, smash it against me I want the whole deal"

"And THEN you'll fuck me like the wild stallion you are?" Hayley asked, hopeful and lustful.

"One track mind, huh? But yes, I'll rock your world like no man like ever before." Steve said with a wink..

"You son of a whore! I'm in" Hayley said, totally lost in her own need for pleasure right now.

'If twerking and grinding on his face will get him to fuck me, then I'll do it!' Hayley thought she moved up and made both front chairs lean down to give her room.

"Oooh yeah sis, show me that phat marshmallow of a booty and let me see how slutty you can be with it"

Hayley gladly did so as she crawled in the bent seats and turned on the radio, finding some good dance music before she squatted on the bent seats and put her hands on her knees.

"Here it comes! Get ready because this caboose is on the move!" Hayley said as she began shaking her ass.

"Hmmm~Yeah move that caboose, throw it back bitch! Do it like your struggling for cash hehehe"

'I sort of am but I don't care about money right now!' Hayley thought, putting all her efforts into shaking her ass back and forth.

Steve watched as his sister's large pawg booty shook and rippled with each move, it was in such a way that he could tell from that alone she had experience with it. With a wide grin his land went *SMACK* on it as he watched it wiggle.

"OH! Keep spanking me, honey! Mark my ass as yours!" Hayley moaned loudly.

"You want marking? Then you are gonna love this"

He said before shoving his face right in between her ass cheeks, glasses out of the way and what was left was just a hungry teen who held onto her fat ass cheeks and started rubbing his face left and right while giving a few smacks in the meantime.

"BRRRRRRRRRR!" Steve let out, sending vibrations through Hayley's entire body!

'HOLY SHIT! HE'A MOTORBOATING MY ASS!' Hayley thought as she let out a strange mix of moaning and screaming.

Steve had that horny teen energy that would make sure to enjoy every part of her as much as possible, it was different from most guys in a vibe that she liked.

Especially someone like Je-

'NO! Don't think about that dumbass! Focus on your stud brother!' Hayley's feral and sexually frustrated side screamed in her mind as she clenched her ass against Steve's head!

"FUCK! I can't do this anymore, I am so pent up! I want you to do whatever you want with me Steve, treat me like a slut i dont give a fuck! Make me feel like a woman"

'Oh shit! She's even hornier than I thought she would be! I must really have a bigger incest kink than I thought!' Steve thought.

"I can't remember the last time I had a real orgasm that was not just by my hands" Hayley said in desperation as she started moving her ass back and forth.

Smashing it against Steve's face and covering it in sweat or her pussy's fluid

"Geez Hayley you're such a slut, you want your brother cock that much?" Steve smiled at her needy self.

"YES! Please! Give it to me now!" Hayley moaned loudly.

"If you want it so much then come and take it!" Steve said with his hands behind his head "Come and insert my manhood inside you, ride and bounce on it as if it's your toy sis"

Hearing this, Hayley smiled as wide as she could while stopping her twerking. Looking back, she eyes Steve cock like a predator and licks her lips in "hunger."

"Fucking Finally! I'm about to bounce my ass on this bitch!" She said before grabbing her phone and choosing a song for the situation.

One even better than the song on the radio since it was from Hayley's personal playlist.

She lowered her wet pussy just one inch away from his cockhead and grinded against it, just to be the one to tease Steve now before going wild.

"Ready, Steve?" Hayley asked.

"Oooohn~" he moans, feeling it and wanting more "You know it sis, cmon! Do it, I want to see you ride me!"

With a single nod and a firm PUSH down, Hayley screamed loudly as she impaled herself on his cock!

"FUCK! Arhgmmm...shit! Your so big, what the fuck! Why do you have such a big sexy dick?" She said while her hands clenched and eyes bulged out.

"Don't know, don't care! Just keep using that fat ass to ride it!" Steve shouted as he leaned back, clenching the car seat.

Hayley's hands were in her own thighs as she made sure to bounce herself up and down her brother's large throbbing cock, feeling just how big it was going in and out of her pussy, stretching it up like no man ever did to her.

'This is it! This is what a real man should be like!' Hayley thought in pure ecstatic lust!

Steve couldn't help but moan, his body trembling with each wave of sensation. It was overwhelming, more vivid, more intense than any dream he'd ever experienced. The warmth, the slick sheen of sweat, the way every movement carried a weighty, almost hypnotic rhythm.

"Ohhh, fuck," Steve gasped, his voice shaky and raw. "This feels so good... so intense." His body tensed, every nerve alight, the pleasure crashing over him like a relentless tide. He couldn't contain the sounds slipping from his lips, each sensation pulling him deeper into the overwhelming ecstasy.

"That's what sex should be! Hot, intense, mind blowing!" Hayley moaned, slamming her hips down to grind against his cock!

"Uuuuuhhh~I bet you married Jeff because you like a pushover to push around, but deep down you want to be the one being pushed!" He said, slapping her ass like a common whore.

"Oh fuck! Yes! Why do you think I always went for big strong guys before settling?!" Hayley moaned, leaning back and letting Steve wrap his arms around her waist.

"Ugn! uHM! Oh yeah? Well guess your type now is scrawny growers like me" Steve went to give her a small bite in her neck.

"OH BABY!" Hayley moaned from the bite.

Steve moved his hips in sync with his phat ass sister who bounced on him for dear life, he could feel it..it was so close! He was gonna cum and flood this bitch inside with his seed.

But he still wanted to tease her a bit before he blew his load.

"Where do you want it, bitch?! You want inside that fat ass of yours or inside of your hungry tight pussy?!" Steve said right into her ear.

"Nnnnggmmm~God, if I could get it in both of them it would make me so happy. Shame you only have one dick, I want to be creamed so bad" She said as her cheeks wiggle by themselves.

"Maybe I'll have two in my next dream!" Steve said with a groan, still thinking this was a dream as his limit was breaking!

They were going at it so hard and fast that the car was starting to shake, their back bumper fun becoming intense, their breathing fogging up the windows.

'Oh god! This is the best sex I have ever fucking had! I'm never gonna be able to fuck anyone else!' Hayley thought.

He gets aggressive, pushing Hayley against the window of the backseat of the car as his throbbing cock is about to explode!

"TAKE IT! Take it you, bitch! Take my load and don't spill a drop!" Steve screamed at her.

Steve then pulled Hayley's Hair back making her yelp as the flood gates were open,the well endowed Nerd proceeded to blast off his thick pent up semen up his sister's unprotected womb, shot after shot! As the latter moaned loudly, feeling her brother's hot cum fill her up as if that was the first time he came in months!

"UUUUUUUUUH!" They moaned/groaned before Hayley suddenly reached back and pulled Steve closer!

MWAH!

Kissing him deeply and thoroughly as she swirled her tongue all around his mouth without mercy.

This felt so good and pleasurable that Steve felt like he never wanted to stop cumming, but no matter how perverted he was, his body eventually stopped, leaving two sweater incestuous lovers.

Pulling away from Hayley, Steve slowly pulled his cock out from her hungry pussy and flopped against the backseat while taking deep breathes.

"H-H-Ho-Holy shit." Steve let out.

His heart beat fast, his body was sweaty, and he could swear he just came the equivalent of a torrent...for a moment he thought ,was this really just a dream?

"So, up for a second round back home?" Hayley asked, regaining her strength a bit faster than Steve. "I can call into your school and say you're sick."

Steve was still trying to understand if this was reality or not "Y-Yeah sure haha, just...let me take a breather"

Hayley giggled at his response before giving Steve a kiss on the cheek before picking up her clothes to get redressed.

Whether this was real or not...one thing was for certain.

'Fuck my sister is hot'