Chapter Text
Dipper groaned softly as he got out of bed, the sun shining through the window and in his eyes. Sitting up in bed, the young man stretched up with a yawn, scratching his stomach as he did.
He glanced across the room at Mabel, who laid sprawled on her own bed. Her snoring could be heard across the room, her mouth agape.
A smile then crept on Dipper's face before hopping out of bed. He was so tempted to give her a rather rude awakening, but decided to be merciful to his twin this morning.
Instead, he made his way down the hall to the bathroom for his usual wake up whiz. Luckily, he managed to get there before his grunkle.
Standing in front of the toilet, he dropped his shorts, reaching down towards his cock. All the while, he focused down at the toilet bowl.
He gave a confused hum when he couldn’t feel himself. So he reached closer to his waist.
“Ah!” A surprised gasp left him as a jolt of sensitivity hit him when he felt a nub.
His eyes widened as he cautiously began to prod at his crotch, heart racing and sweat running down his back. Nervously, he began to glance down at his crotch, fearful of what he would discover.
“AAAAAAAAHHHHHHH!!!!” He screamed, panic running through his body as he realized that his dick was gone. Now all that was there was a…vagina.
He ran out of the bathroom quickly, fear replacing any urge he had to go pee. Running back to his room, the first thing he did was shake Mabel awake.
“MABEL! GET UP!!” He yelled in a panic as he shook the young girl up.
Despite how frantic he was, Mabel let out a yawn as she sat up on the bed. “Man, bro, what’d you wake me for?” She asked lazily, rubbing her eyes with the back of her long sleeves.
“Mabel, something’s wro-“ Dipper’s glance shifted down at his twin, now noticing a rather large tent on her crotch. He gave a nervous hum, pointing at the area in question.
She tilted her head in confusion until finally she looked down. Immediately, her eyes widened in shock before she turned back to her brother.
“AAAAAAAAAAAAAAHHHHHHHH!!!” They both screamed in confusion as Mabel shot out of the bed, looking down at the tent in her shorts.
“Pipe down up there! You know I’m not afraid to make you work!!” cried Stan from the ground floor, instantly shutting them up.
They both looked into each other’s eyes, sweat running down their cheeks. Next, the twins looked at the other’s crotches, Mabel biting her lip nervously.
“Does…Does this mean you have-“
“Yeah, Mabel. I do.” Dipper answered with a sigh, and without any hesitation, he dropped his shorts and underwear for her. His newly-discovered cunt was on display.
“Oh…wooooow.” Mabel’s eyes widened as she stared at it. “This is totally weird…but kinda cool.”
Her cock throbbed in her dress, threatening to peek out from under it as she kept staring.
Dipper’s cheeks went red in realization, “Mabel! Stop!” He said firmly, making the other snap out of her trance.
“Huh? Whuh?” She asked, looking back at her brother’s face. A gasp then left her as she looked down at herself, and almost instantly she pulled up her skirt and dropped her panties. A smile spread across her cheeks as she stared down at what popped out.
“Wooooah!” She beamed, watching as the thick member twitched and dripped in front of her. She couldn’t help but giggle as she flexed her cock, unable to hide her excitement. “So biiiiig~” She remarked before moving her hips side to side, watching as it swayed with them.
Dipper groaned and pulled up his shorts, knowing that this would be all Mabel would be focused on right now. He looked around the room, wondering if something there would at least give them a clue on how this happened. All the while, the soft smacking of Mabel’s newfound member could be heard.
He noticed a piece of paper on his bed that wasn’t there before. Curiously, he picked it up, reading what was on it.
“HOPE YOU ENJOY THE NEW MODS I MADE TO YOUR MEATSACKS, PINE TREE AND SHOOTING STAR, AS WELL AS SOME SURPRISES FOR LATER. HAVE FUN!
- LOVE, BILL.”
Dipper growled as he finished reading it aloud. He crumpled the paper and tossed it in the trash. “It’s Bill!” He turned to Mabel, who was now helicoptering her dick. Dipper couldn’t help but facepalm, but at the same time found himself unable to look away.
A tingle started to form in his crotch the longer he took in the sight of the other’s thickness.
“…Hm? Did you say something?” Mabel asked, looking back at her brother.
Dipper snapped out of his own trance, clearing his throat. “Bill’s doing this.” He explained, “I don’t know if this is permanent or not, but we’ll just have to deal with it for now until we can find a way to contact him again.”
“Weeeell…I wouldn’t mind if it was permanent~” Mabel grinned as she looked down at her hard cock.
“Mabel! This is serious-“ He froze up, his legs wobbling as he seized up.
Her eyes widened in concern, “Bro-Bro? You okay?” She tilted her head in confusion.
“…Just remembered I have to use the bathroom.” He wheezed before suddenly darting down the hall.
Mabel just chuckled at the sight before returning to playing with herself, now starting to wave her dick from side to side.
A few minutes later, Dipper was still recuperating from having to go to the bathroom with a vagina. Not like it was that different from how he did before, but the shock of knowing that he had one was hard to ignore.
He made his way downstairs, heart racing as he approached the kitchen. Grunkle Stan was in the living room watching TV, focused on whatever was on. Good, the last thing Dipper wanted was anyone looking at him.
He started to approach the fridge, anxiously looking around as he opened it. First thing he did was grab some milk, then set it on the counter before grabbing a bowl and some cereal. This was all so strange and weird; it was hard for him to focus.
Biting his lip, he filled the bowl with cereal, his hands shaking slightly as he did. Once full, he began pouring the milk inside. His nostrils then flared, a sudden, interesting scent hitting them.
“Heeey, bro-bro!~” Mabel announced as she got behind her brother. She rest her chin on his shoulder, feeling the other jolt in surprise with a gasp.
A shiver ran up the young man’s back, the first thing he felt of his sister’s was her hard cock against his buttocks.
“Mabel!” He turned around suddenly, setting the half gallon of milk on the counter. He glanced down at her crotch, thankfully she was wearing her skirt to cover it.
“Whaaaat? What’s got you so tightly tied up?” She asked with a playful smirk.
His face glowed red, “You know what’s going on!” He whispered, glancing in the living room to see Stan still focused on the television with a grin. Dipper could hear “Baby Fights” playing from it.
He then turned back to Mabel, glancing at her crotch. “Mabel…you’re wearing panties under that, right?”
She glanced away with a grin, giving a ‘I dunno’ hum, hands behind her back. “Do you think any of my panties could hold this monster?~” She asked playfully as she pointed to her crotch.
He groaned, “Please, Mabel, we can’t let anyone find out about this.” He shoved a spoon from the drawer into his bowl before grabbing it and heading to the table.
“Oh, lighten up, Dipper. No one’s gonna find out.” Mabel assured before fixing herself a bowl as well. “Besides, I got it wrapped on my leg with a scrunchie.”
Dipper sat at the table, sniffing softly. Some pungent, yet alluring smell filled his head, making him feel warm in all kinds of places. He did his best to pinpoint where it could be coming from, but unfortunately, all signs began to point to the counter where his sister was standing at.
“…Mabel, do you smell that?” He asked, watching the other turn around.
Mabel sniffed softly as well before putting the milk down, “…Yeah, I do…”. She started sniffing rather loudly, stepping closer to the wooden table and to Dipper. Her eyes closed shut, trying to focus on the scent.
As she stepped closer, Dipper could feel the smell getting stronger, his heart racing as she moved closer. Not only that, but the stirring in his loins began to grow more prominent as well. Instinctively, he pressed his thighs together to try and hide it.
Eventually, Mabel was leaning towards Dipper, the smell getting stronger. It was so deliciously intoxicating; she couldn’t pull herself away. She was too caught up in the moment that she didn’t realize that she was moving her face down his body, and soon in front of his crotch.
“M-Mabel!” Dipper said lowly, his face flushed red as he watched his twin put her face between his legs.
Her eyes opened, now realizing that her nose was against his crotch. She looked up at her brother, a grin on her face. “Dipper~ I think I can smell your pussy~” She chuckled.
Instinctively, he pulled back from her face, hopping off the chair and away from the young girl. His face was completely red, legs shaking slightly as he eyed Mabel.
She got up from the floor, now taking her own seat at the table. “I bet what you’ve been smelling earlier was my new addition down here~” She grabbed her hard member through her skirt.
He gulped nervously, sitting down at the table before eating his cereal. “Bill must be doing that as well. He must have done something to our olfactory senses to become more sensitive to smells like that.”
She rolled her eyes with a sigh, “You’re getting way too antsy about this, brother of mine, let’s just enjoy what we have~” She began eating her own cereal with one hand, the other reaching under the table to start feeling up her hard shaft in her skirt.
“Mabel, this is serious! What if we never turn back to normal?” He asked incredulously.
“So, what if we don’t? I’m sure we can both make due with these, right?~ Granted, I’ll probably have to get some boxers, or maybe I can just let it hang out~”
Dipper groaned, looking back at his cereal, shoveling his mouth. Sure, she probably thought it was great to have a dick, but she’d eventually run into some problems eventually. He knew he was having a few issues ‘downstairs’, such as how hot and wet he felt.
“Hey, Mabel. Is it normal to get all…wet down there?” He asked, trying to keep his voice low.
As soon as she heard him, the young girl couldn’t help but start giggling, having to cover her mouth as she kicked her feet under the table. “Dipper, that means you’re really excited~” She answered lowly, knowing that he knew what that meant.
He froze in his chair, pressing his thighs together in realization. He couldn’t so much as look at Mabel, trying to focus on his cereal.
That couldn’t be, right? This was his sister he was talking about! Sure, she was nice and funny and a blast to be around, but there was no way he was getting horny from her…right? This was Bill they were dealing with, however.
The two of them continued to eat breakfast, both shooting glances at each other. Mostly it was Mabel wiggling her eyebrows while Dipper looked away nervously.
“Welp, think I’m gonna go out and have a day out with my new ding dong!” Beamed Mabel as she hopped off the chair.
“Mabel, please don’t go showing that off to everyone.” He whined as he watched her leave.
“Awww, you gettin’ jelly, Dippin’ dot?~” She smirked, looking at him from behind.
“No! I’m not jealous! This is huge!”
“Yeah, I know it’s huge~” She teased, cupping her crotch, causing Dipper to groan in frustration. “Relax, bro, I’m not gonna tell anyone about it.” She assured, crossing her fingers in her pocket. It wouldn’t matter if she showed it off to her girls, right?
“You better not! I’m gonna try and figure out a way to fix us.” Dipper marched past her, now heading back upstairs.
“Well, take your time!” Mabel called out, watching him rush upstairs. She then turned to the front door, hand sliding up her legs toward her cock, giving it a soft pat.
“Now, time to see what fun we’ll have~” She hummed as she made her way out the door.
Dipper found nothing relating to fixing any genital swapping, or magic that could make a person more sensitive to smells. It drove Dipper up a wall, fearful that him and Mabel could be stuck this way forever! Or worse: Bill might just screw with them in other ways.
It was hard for Dipper to ignore, and even harder for him not to touch. As surprised and unsettled as he was at having a vagina, he couldn’t deny how good it felt when he rubbed his fingers against it. But he also knew that he shouldn’t be getting used to it. At least, that’s what he told himself.
But that was only the beginning of Dipper’s troubles. Soos couldn’t come in that day, so Dipper was in charge of sweeping and general upkeep of the Mystery Shack. This was an annoyance on a regular day, and it wasn’t like anyone could tell the difference of him having a pussy or not. The difficulty that came with this, however, was that Wendy was still working that day.
Sure, she was just as aware as anyone else what was going on, but her presence alone was driving Dipper up a wall. His sex was dripping with arousal, and Dipper’s entire body heated up just at the sight of her. It certainly didn’t help that the – for lack of a better word – cock smell from this morning tickled his nostrils. Mabel must have stopped by here while he wasn’t looking.
He continued to sweep across the shack, moving past any other patrons as he did. He hoped he looked inconspicuous enough to both everyone and Wendy. So far, she didn’t seem to be interested in anything else other than her magazine. As usual. Thank goodness.
As time passed, Dipper found himself becoming more and more comfortable with the situation at hand, granted he did take quite a lot of bathroom breaks to clean himself up, but no one seemed to notice. Or at least, few people of note noticed.
The thought of touching himself didn’t come to mind for the young man, but the sheer amount of slick leaving his pussy was so immense that he needed to clean up quite a few times. He was scared to touch it, but he also wanted to touch it to see what it was like. At the same time, he felt that once he tried touching himself down there, there was no going back. From what, he didn’t know.
In any case, Dipper continued to dust off as many fake relics and oddities as he could, confidently humming to himself. Maybe he could go through this day just fine after all.
That was, until a powerful, scent hit his nose. One that he recognized right away thanks to this morning. Coupled with the sound of footsteps approaching him, he knew his twin had just returned. A bit early, though.
“Mabel, what hap-“ Dipper turned around, freezing up as he realized that it wasn’t his sister at all, but Wendy. He felt himself start getting sweaty, pressing his legs together in a vain attempt to hide his arousal. The fact that the smell Mabel gave off earlier was coming from Wendy now told Dipper a lot of things that he didn’t want to accept or think about just yet.
The older teen looked down at Dipper with a cocked eyebrow. “You alright dude? You’ve been acting weird all day. Even more than usual.” She asked, arms crossed.
“Yeaah, totally! I’m cool!” Dipper assured, a plastic smile on his face. Clearly, he was the opposite of cool.
A sigh left Wendy, reaching down and setting a hand on his shoulder. “C’mere, man.” She began to escort him towards the back of the shack, the employees only area.
Little did Wendy know how much a simple touch was doing to Dipper. His entire body heated up, his sex drooling with excitement as he was now being led somewhere private by the older teen.
Once they were alone, Wendy locked the door behind her, turning to Dipper as she leaned against it. “Think I know what’s been bothering you.” She said confidently, eyes immediately shooting down at his crotch, noticing the dark, damp spot on it.
“You got a pussy that won’t quit, right?” She asked with a grin, watching as Dipper’s face went pale at her quick assumption.
He stared up at her, wide eyed and with mouth agape. No sense anything from her then. “But…how did you…” He trailed off.
Immediately, she began undoing her own jeans, dropping them to the floor to reveal that in her boxers was an impressive, thick bulge. Not only that, but a good few inches of a cock were sticking out of one of the pant legs of her underwear, keeping it stuck to her thigh. There was also a condom wrapped around the exposed flesh, which was filling up with pre as it throbbed.
“I’m kind of in a spot like that myself.”
Dipper couldn’t stop staring at it, the only thing on her mind being that thick, throbbing piece of meat that was hanging off of Wendy. If he thought he was ornery before, the sight and scent of the cock hanging in front of him was driving him up a fucking wall.
His body trembled with excitement, unsure what to do now. The girl of his dreams was sporting something that he wanted nothing more than to be inside him.
“Yeah, I don’t know what happened, I just kinda woke up like this. But I mean, it seems pretty fun to have, so I didn’t make a big deal about it. Just thought it was another weird thing that goes on here. But then I kept smelling…something, and it kept happening every time you were in the room.” She explained very casually.
As Wendy spoke, Dipper couldn’t take his eyes off what she was packing. The only thing he was thinking of was ripping off those boxers and having that cock inside him! This wasn’t Mabel, so he could enjoy having that in him without any regrets, right?
Wendy chuckled, noting how distracted Dipper was at the moment. She realized that words were meaningless now and reached down to pull off her boxers. “Well, looks like foreplay isn’t gonna be an option.” She said before letting her thickness pop out of its cloth prison.
Dipper had no idea what was coming over him, the sight of the impressive member made his mouth water and his newfound sex flood with arousal. The only thing on his mind was having Wendy’s cock inside him, and nothing more.
Wendy chuckled at how ridiculous Dipper looked, eyeing her cock with so much devotion and admiration. Playfully, she swayed it from side to side, watching the young man’s eyes follow it.
“You want this, don’t you?~” She teased, seeing Dipper nod quickly as he stepped closer to her.
“Well, come and get- AH!~”
Without any hesitation, Dipper shoved his face down her cock, taking about half of it before realizing that it would be more difficult than he thought. His throat was already bulging, the taste and scent of the massive member snapping Dipper from his haze.
He looked up at the redhead, watching her gasp and whimper in pleasure. What was going on with him?! Was this also Bill’s work? He started to pull back, humming against Wendy as he did.
At least, until he felt a pair of hands on the back of his head, pulling his hat off in the process and preventing him from pulling away. A confused hum left the young man, looking up to see Wendy looking down at him with a grin.
“Where do you think you’re going?~” She asked before shoving herself deeper down the young man’s throat. She pushed all the way to her base, feeling his muffled cries against her pelvis.
Panic started to rise in Dipper’s chest, the lack of oxygen making his mind fuzzy and his breathing focus on his nose. Tears were running down his cheeks, hands gripping on to her thighs for dear life. He felt trapped by the teenager, but he didn’t protest it in the least.
While confusion and uncertainty were rising in the young man, another feeling overpowered it all: sheer ecstasy. Obviously, he was overwhelmed by emotions as he choked down Wendy’s massive member, but throughout the whole ordeal, he felt an immense amount of joy and contentment. It was like he was meant to be here, it felt so natural.
The tip of her cock felt like it was deep in his stomach, her shaft throbbing and dripping pre into him as she did.
A few more seconds passed before she finally began to pull back out of his mouth, stopping halfway before slamming down his throat once more with a pleasured moan.
“Fuuuuuck!~ You’re so tight, dude!~” Cried Wendy, now thrusting down his throat over and over again. Her grip on his head tightened, teeth gritted and eyes slammed shut as she savored his mouth. “No wonder Robbie kept bugging me to get him off~”
Dipper remained on his knees in front of her, staring admirably up at the redhead fucking his throat. He felt like the luckiest guy in the world right now, taking her fat cock down his throat over and over.
His sex was flooding his shorts, arousal soaking through his boxers and his shorts and dripping onto the floor. A small puddle was already starting to form. Wave after wave of pleasure shot through Dipper just from feeling Wendy deep in his throat. His hands remained at her thighs, not bothering to touch himself as Wendy kept slamming deeper into his throat.
As time passed, her thrusts began to pick up speed, a clear sign that she was about to cum. Her fat balls gave an audible smack against Dipper’s chin as she kept slamming down his throat.
“Dippeeerrrr!~” Wendy moaned out, nails digging into his scalp. She could feel herself edging closer and closer to climax. Sweat soaked into her shirt, running down her legs as she kept abusing the young man’s throat with her cock.
He knew what was gonna happen, and he was overjoyed that he was going to bask in Wendy’s orgasm. His own climax started to creep as well, any thoughts or concerns about him having a pussy were pushed away in favor of ensuring Wendy’s climax was smooth and ecstatic.
A few more pleasured gasps and moans erupted from Wendy, thrusting a few more times into Dipper’s eager mouth before slamming as deep as she could. A shrill cry erupted from her as she began pumping her load down his throat.
Her thick, warm seed was being pumped directly into his stomach, making Dipper climax as well. The clear, sticky puddle beneath him was growing as his slick pooled. His own pleasured cries were muffled by her shaft, feeling it throb as her load shot deep inside him. Dipper’s eyes were rolled back, pure joy filling his being.
She kept him still there for the entirety of her orgasm, making sure he didn’t move an inch. She could see his stomach slowly start to distend as well, but she just took this as an indication of how well-endowed she was down there. He almost looked pregnant. The thought of that amused the young woman to no end.
A few more seconds passed before her pumps of jizz were only dripping. Wendy was gasping for breath, cock still sheathed deep down the other’s throat for a few more seconds before she mustered up the strength to pull her half-hard member out.
Once her cock was out, Dipper found himself gasping for breath as well, hunched above the floor as he did. An occasional cough left him as he did his best to recuperate. But how the hell could he ever come back from that? Come back to that?
“Daaaamn~ Had no idea you could do that~” Wendy remarked, reaching into her discarded jean’s pocket to pull out a condom.
“I…have no gag reflex.” Dipper admitted, earning an amused chuckled from Wendy. He knew how attractive that would sound to people.
“Of course, you don’t.” She remarked after pulling the struggling condom over her flaccid length. She then pulled her boxers and jeans back on, eyes on the young man struggling to get back to his feet. He had quite a bit of new weight to carry, so of course he’d be stumbling.
She took the liberty to help him up, taking his hand in the process. He looked up at her with a smile, a blush forming on his face.
Wendy then reached down to where his hat was on the floor and put it back on his head. He looked weird without it.
“You might wanna change out of that, though.” She remarked, glancing down at the noticeable, dark spot on his crotch.
Dipper looked down as well, doubly embarrassed that his pussy soaked through his shorts. “Right, y-yeah.” He said, thighs pressed together as he let Wendy escort him down the hall. Lucky them, Stan was too busy pandering to tourists to notice.
“Alright, I gotta get back to work. But I’d love to do this again another time~” She winked before letting go of his hand and heading back to the front desk.
Dipper’s heart sank a bit when she left, feeling a bit lonely without that overwhelming, powerful scent near him. But he had a feeling this wouldn’t be the last time this would happen.
In any case, Dipper made his way up the stairs, limping slightly. One hand kept a tight hold on the railing while the other cradled his plump stomach. Little by little he got closer to the top until finally he reached the top stair.
A relieved sigh left him, proud of himself. But before he could register what was happening, he suddenly found himself being dragged away toward his room, a yelp leaving him.
“DIPPER!!” Cried Mabel as she slammed and locked the door behind her. She left her brother to stumble to his feet before sitting back in his bed.
She then turned to face him, a wide smile on her face. “You will not BELIEVE what went down!”
He already had a feeling, judging by the fact that her cock was hanging out from under her skirt, and dripping with various juices and slicks. She didn’t seem to notice his belly yet.
“Having a dick is AWESOME!” She proclaimed bouncing in place, her cock swaying a bit as she did. “Like, I showed it to Candy and Grenda, and they were all over it!” She explained eagerly, pacing around the room.
Dipper didn’t have it in him to get mad at her for breaking her promise. Even if he did, he was hardly one to talk. His focus, however, was dangling from between Mabel’s legs. Unashamedly, he admired the impressive cock she had. It wasn’t as big or thick as Wendy’s, but he’d still love it inside him. However, this meant that he drowned out most of what his sister was saying.
“But what was really surprising was how easy Candy could fit it in her pussy! But I do wish she would stop saying your-…Dipper what happened to your belly?” She pointed at him, realizing what was so different about her brother.
He snapped out of his haze, a dark blush on his face as he turned his attention back to Mabel’s face. A sigh left him, figuring there was no point in beating around the bush.
“Well, as it turns out, Wendy got a dick too.” He explained, earning a gasp from his twin.
“Wendy’s got a dick?! That’s SO COOL! We should totally compare!” She beamed, but her joyous face quickly turned to one of knowing smugness.
“Ohhhh, I see now~” Mabel approached her brother with a grin, resting a hand on his belly. “You must have gotten real familiar with it, huh?~” She chuckled playfully as she rubbed his stomach through his shirt.
Dipper whimpered in shuddered at the sensation, biting his lip. “Y-Yes!” He admitted, “It was the most amazing thing ever!~”
She then pulled her hand away from his stomach, looking down at his stained pants. “Woooow, you really squirted for her, huh? At least she had a lot to lube her up.” She said, a hand resting on his thigh.
He squeaked at the feeling, “A-Actually, Mabel, she didn’t…put it in me down there. It was in my mouth.”
“Hmm…I see…” She mused, staring down at his soaked shorts. She then licked her lips, an idea popping in her head.
“Then that means you’re still a virgin~”
Dipper froze up in realization, those words hitting him like a tone of bricks. A faint feeling of shame hit him, like he missed an opportunity that he would never get again. Although, he didn’t doubt that Wendy would come after him.
“How about we fix that?~” She suggested, already undoing Dipper’s shorts and pulling them off along with his boxers.
As soon as the cool air hit his moist sex, Dipper let out a shrill whimper. His face was flushed red, realizing that he was exposed once more to his sister.
She couldn’t stop giggling as she got hard, her throbbing member clearly ready for action as it peeked under her skirt. “Ohhh, this is great!” She beamed, no hesitance in her voice as she prodded the tip of it to his sex.
He opened his mouth, about to protest this act, ready to reiterate that they were twins and shouldn’t do this. But he couldn’t bring himself to do it. After what he experienced, the fact that they were related didn’t matter in this moment. She was a dick, he was a pussy, and that was more than enough for the two of them. But he still had something he needed to say.
“M-Mabel…”
This got her attention, hesitating to put it in as she looked into his eyes. A hum left her as she tilted her head to the side.
“…Fill me up~” He resigned with a grin, relaxing on the bed. He was more than ready for what was to come next.
A smile spread across Mabel’s face, her now hard member pushing against Dipper’s tight, wet sex. “Mmm~ I’d be happy to~” She moaned, grunting softly before managing to shove the tip into him. Both of them were moaning and crying out in pleasure, the feeling of each other sending waves upon waves of pleasure throughout their bodies.
Dipper’s head shot back as his walls were stretched by his sister. He held on for dear life to the blankets, his body rocking and shuddering in bliss. She wasn’t even halfway in, and already he was convulsing in ecstasy.
Mabel grit her teeth as she kept pushing more and more inside her brother, moan after muffled moan leaving her. After a few more seconds, she managed to push her entire shaft into the other, leaving them both out of breath.
She stalled for a moment, needing to catch her breath. Her brother seemed to have the same idea.
Like before, Dipper’s body shuddered and shook at the feeling of Mabel’s shaft deep inside him. This time, however, he could properly breathe, so his shrill pants filled the air.
Mabel marveled at how her cock bulged inside Dipper. Even with his full belly, she could tell how her cock distended inside him. Her hands went to his hips, absolutely giddy as she pulled back. She was her brother’s first time! And she was going to enjoy it!
Wasting no time, she happily began slamming herself into him over and over again, her grip on him tight as she enjoyed his tight, slick sex. His shrill moans and cries of pleasure kept motivating the young woman. Her own mouth was agape as gasp after whimper left her. This was way better than Candy.
Dipper was in heaven. He felt like such an idiot for absconding from this for so long. Even if it was just a few hours ago, he felt like he would regret it for way longer than that. The feeling of Mabel’s hard shaft stretching him out was unlike anything he experienced before.
Sure, Wendy was a joy and a half, but actually feeling something inside his pussy was a different beast altogether. His sex was soaking Mabel’s cock with slick, making sure it was lubed up for the current pounding. Not only that, but her dick was rubbing inside him in just the right way to make him a bigger mess than he was already.
All Dipper could do now was hold on for dear life and let his sister have her way with him.
“Ahhh!~ Fuck, bro~ You’re so tight~” She praised, a smile on her face as her nails dug into his sides. She then started to pick up the pace, already feeling herself edging close to climax. She couldn’t put it into words, but Dipper’s pussy just felt different in the best of ways.
“D-Dipper! I’m gonna cum!~” She warned with a pleasured grunt, slamming herself harder and faster against him. The smacking of flesh filled the room as her grip on him got even tighter, threatening to break the skin. She was hunched over, her forehead now pressed against Dipper’s.
“D…Do it, Mabel~” Dipper exhaled, “I want you to shoot inside me~”
Mabel didn’t need to be told twice, her cock throbbing and aching for release as she kept thrusting into her. Her moans were rising in volume and pitch, sweat soaking inside her sweater as she moved closer and closer to the edge, until finally she popped.
Her head shot back with a shrill cry of ecstasy as she shoved herself as deep as she could in her brother, pumping her hot load inside his pussy. The feeling of it was unlike anything she felt before. She couldn’t help but smile as she pumped the young man full.
Dipper grunted and shuddered in bliss, feeling Mabel cum inside him. He didn’t care about any possible consequences this would have, all that mattered was that he was getting his sister’s hot load. He had an ecstatic, blissful look on his face as well, mind hazy as he stared at the ceiling.
Soon, Mabel was laying beside him on the bed, both of them gasping for breath as they basked in their afterglows. Cum was dripping from Dipper’s sex and onto the floor, something for another time.
Mindlessly, Dipper reached for his sister, wrapping his arms around her with a whimper. He felt so vulnerable, he needed something to keep him grounded. His eyes remained shut as he laid in bed.
Mabel gasped softly, looking down at her brother with a grin. She enjoyed these rare moments of vulnerability from him. She happily held him close, her eyes starting to shut as well. With a yawn, she felt herself drift off to sleep with the other, hoping that she when she woke up she still had her new attachment.