Sibling Sparks

Story by BuiJay24 on SoFurry

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#13 of Furtropolis

Sibling sex... the best sex~

Here's something for all of you who are big fans of incest! Featuring some Protogen on Synth fun, hope you guys enjoy it as always! Love you all ^w^


Rainy afternoons, the perfect time to stay inside and spend time with loved ones which is what BuiJay and JayZel were doing. Spending time inside with each other, playing video games like typical siblings would usually do from time to time.

"Damn it JayZel how are you this good?!"

BuiJay the Protogen yells in frustration, a little angry that his brother was wiping the floor with him in a 1v1 match.

"Practice makes perfect bro."

JayZel the Synth replies with a smug look on his face, the game ending minutes after he says this.

"Hmph..."

"Looks like I win again, wanna play another round?"

"I don't really feel like losing to you anymore, how about we watch TV or something."

"Alright, but first... I believe we made a deal~"

"Yea yea I know... you get to teabag me..."

"Hehe don't act like you don't enjoy getting teabagged after losing to me~

"Ugh... it's the only good thing about losing...~"

"On the floor bro~"

JayZel said with a smug voice, BuiJay just glares at him before laying down on the floor in front of him. Once the Protogen had done what he was asked to do, JayZel squats down over his visor his balls hanging down inches away from his face before they were dragged across him back and forth BuiJay moaning as his brother's balls were being dragged on him.

"Yea you like that bro?~"

"Mm... mhm~"

"I bet you lose on purpose just to be teabagged by your brother~"

"S-sometimes...~"

"Heh I knew it, such a dirty Protogen you are... now open wide BuiJay it's time for your favourite part~"

"Gladly~"

He did exactly what he was told, opening his mouth nice and wide for JayZel so he can drop his plump Synth balls inside doing so very slowly, lowering them into his mouth stopping once they landed on his wet tongue leaving them in there for a few seconds before pulling them out only to repeat this process over and over again not letting BuiJay suck them just yet.

"How's this you dirty Protogen?~"

"Mmmm I love it...~"

"Wanna give 'em a suck now?~"

"P-please~"

"Alright then...~"

JayZel rests his balls inside BuiJay's mouth.

"...Go for it bro~"

"Mmmm..."

He wastes little time sucking his brother's plump sack, slurping all over it while moaning softly enjoying the feeling of his balls inside his mouth as he sucked them, dragging his tongue all over the smooth ballsack while suckling it. JayZel gently pulling them out halfway through without warning.

"That's it BuiJay, we don't wanna spend too much time on that... how about we both lay on the couch and explore each other sexually like we always used to do~"

"Mmm... okay~"

So they did exactly that, both of them laying down on the couch across from one another as both their cocks twitched frequently.

"So what do you want to do first BuiJay?~"

BuiJay smirked at him before putting one of his large hindpaws on his brothers crotch and rubbed it gently. Being intimate with each other was nothing new for the two siblings both exploring each other sexually and satisfying their sexual urges on a regular basis and even though JayZel had a girlfriend he was allowed to have intimate relations with his brother.

"Ahh... fuck I love your paw BuiJay... it makes me want a pair of soft paws myself so I could return the favour~"

"Don't worry bro, your pleasure is more than enough to return the favour~"

BuiJay grinds his paw harder against his crotch making his synthetic cock throb in excitement, making him squirm in the process. He soon brought his other paw to his crotch and wrapped both of his soft plush paws around his throbbing cock firmly, stroking it with them earning a soft moan from him as his shaft pulsed between his brothers paws squirming wildly already, BuiJay's pawbeans pressing right up against the synthetic member. As BuiJay was grinding his soft paws on his brothers throbbing shaft he massaged his balls, beginning to masturbate soon after while giving the squirming Synth a thorough pawjob.

"Fuck bro~"

"Enjoying my paws JayZel?~"

"Sooo much~"

"Good~"

BuiJay smirks at him before stroking his shaft nice and fast with those paws of his causing him to moan louder and squirm even more as he started to leak precum on them making it a whole lot easier for BuiJay's paws to slide up and down his thick shaft as his beans pressed even harder against it, JayZel enjoying every last second of his brother's paws squeezing and stroking his dick as it throbbed between them. There was just something about his soft beans sliding along his cock that was extremely pleasurable to him.

"Ohhhhh BuiJay you're so talented with your paws~"

"Heh, Buizie says the same thing. It's amazing what you pick up when you're best friends with a pawslut~"

BuiJay tightens his grip on his cock and increases his speed.

"Mmmmf... I can see why he loves it~"

"Good, Just relax and feel my big soft paws stroke your cock~"

BuiJay strokes his cock with his paws as fast as he could while continuing to jerk off, pleasuring himself to the sight of his own paws milking his brothers twitching member which was getting close to it's climax, JayZel breathing heavily as he gotten closer and closer to blowing his load.

"Ah... B-BuiJay... I'm gonna cum...~"

The Protogen moves his paws off his member and positions them just in front of it.

"Jerk off and shoot your hot load all over my paws then, JayZel~"

"Mmmmf... Gladly~"

JayZel proceeds to grab his cock and jerks off as fast as he could holding on to BuiJay's leg as he got closer and closer to his orgasm, mere seconds away from blowing his cum on his paws. It wasn't long before he did just that, shooting thick ropes of cum all over BuiJay's paws as he moans out loud covering them in his warm semen in little time painting them white as the sweet feeling of euphoria flooded his body as he orgasmed. JayZel shot a few more ropes of cum on his brother's paws before his orgasm began to die down, the rest of his cum leaking down his cock as he panted heavily while staring down at the Protogen's now cum-covered paws.

"F-fuck JayZel you made a big mess~"

"What can I say? Your paws just felt so good on my dick~"

"Well you can clean up your mess now~"

BuiJay brings both his paws up to his visor, dripping a few drops of cum onto the bed as he does so.

"You mean..?"

"Yep, lick em clean~"

"Is this what Buizie usually does?"

"Mhm, it's his favourite part~"

"I'm not sure I can lick all that off..."

"Well you either do that or I'm using you like a doormat to clean em~"

"...Make it quick...~"

BuiJay wasted little time wiping his cummy paws on his brother's face, bringing them closer until they made contact with his visor, starting to grind them firmly on his face soon after, still stroking his cock as he watched his brother squirm as cum was being smeared all over him.

"How's this JayZel?~"

"Mmmf... just keep going...~"

"Enjoying it aren't you?~"

"Maybe...~"

"Hehehe~"

The Protogen chuckles while grinding his paws harder on his brother's face making squirm even more as soft moans start to escape his mouth, more cum smearing all over his visor to the point where he could no longer see. BuiJay's paw grinding lasted for a few more minutes before pulling them away from his face to look at the mess he made.

"Oh my, your visor is all white now... see that wasn't so bad now was it?~"

"Sh-shut up~"

"Hehe, unfortunately for you my paws need a little extra cleaning so... get that tongue of yours to work~"

"F-fine~"

"Good boy~"

JayZel blushed deeply as he coyly grabbed one of his brother's paws, looking at the cum that was still in his crevices as well as a small amount still on his pawbeans. He stared at it for a good few seconds before looking at BuiJay again who was eagerly waiting for the Synth to clean his paw while continuing to masturbate.

"Go on~"

He says with a commanding voice pushing his paw closer to JayZel's mouth, beginning to get impatient with his stalling. JayZel hesitates a bit before closing his eyes and bringing his mouth closer to it sticking his tongue in the crevices of the paw pads licking every little drop of seed out from it, scrubbing it with his tongue making BuiJay moan softly as he enjoyed the feeling his brother's tongue lick his paw clean, replacing the seed with saliva. It only took him a few seconds to clean out the crevices completely but that didn't stop him from continuing to lick it a few more times to make sure there wasn't any cum left on it, swallowing all the semen he collected before pulling away only to dive back down to his paw to lick his pawpad clean, polishing it with his tongue before giving it a few deep kisses really getting into the Protogen's paws now.

"Mmm look at you worshiping my paw, it didn't take you long to enjoy that huh?~"

"You're enjoying the fact that you're turning me into a pawslut aren't you?~"

"Yep, now finishing cleaning that paw so you can clean my other one~"

"It's already clean~"

"No it's not, I still feel cum on my toes~"

BuiJay says as he wiggles them in his face.

"God why do I find that so hot...~"

"Cause you're a pawslut now, get to it bro~"

He says before shoving his toes into his mouth which JayZel immediately starts to suck on getting his tongue between his toes making sure it was clean, slurping in between as he does this while moaning softly, pulling them out once they were all clean and coated with saliva.

"There, happy?~"

"Very, now get to work on the other one~"

JayZel does so eagerly, grabbing BuiJay's other paw and repeats what he did with the other one licking the crevices slowly collecting the semen on his tongue swallowing each drop as soon as it entered his mouth, licking it a few more times after the cum was gone to make sure it was completely clean just like he did last time before moving to his pads to lick off the left over semen that was still on them, kissing his pads once they were clean as well before moving to his toes giving each of them a quick suck.

Once he finished with the other paw BuiJay booped him with a toe before pulling his paw away slowly with a smirk sitting up soon after, leaning towards JayZel as he opens his maw pushing his brother's head closer to him diving down for a kiss, their synthetic tongues making contact in each other's mouths, beginning to wrestle with one another as they swapped saliva. They both moaned as they made out, BuiJay slowly pushing JayZel on his back in the process of this deep passionate kiss. BuiJay began grinding his erect cock against JayZel's once he was laying on top of him causing his brothers cock to slowly erect under his grabbing both of their shafts soon after it was fully erect, stroking both of them nice and slow while their tongues continued to wrestle in a mixture of each other's saliva until BuiJay broke the kiss a few minutes after they started frotting, a thin string of spit connecting their chins once the kiss was broken.

"Aah... BuiJay~"

"Yea you like this bro?~"

"I love it BuiJay~"

The Protogen couldn't help but chuckle as he began to grind and hump against him some more which caused him to let out a few soft moans before grinding himself as BuiJay kept stroking their cocks both leaking small amounts of pre making it easier to grind and hump against one another as the Protogen's hand slid up and down their shafts with ease, going much faster as pre began to cover both their shafts both of them now moaning in unison during this passionate display of sibling private time.

They both began to pant heavily as their frotting intensified, BuiJay really humping and grinding against JayZel's cock while gripping both their cocks firmly stroking both of them as fast as he could making him squirm like crazy as he moaned loudly in between his heavy pants.

"Ohhh fuck... BuiJayyyy~"

"Yea you like that don't you JayZel?~"

"Sooo much... I'm already close again~"

"Mmmf me too..."

BuiJay let's go of both their cocks, letting them throb and pulse against one another as they were suddenly denied a release.

"...But I don't wanna finish like that~"

"H-huh? Oh c'mon BuiJayyyyyy~"

"Nope I have something way better in mind~"

He smirks before slowly making his way closer to JayZel's visor kneeling down in front of him with his twitching member inches away from it, leaking small drops of precum on him as it pulsates.

"I think I know where this is going...~"

"That's right, visor painting time. But before I jerk it in front of you..."

BuiJay grabs his head and pushes his cock up against it, grinding his throbbing dick on him as he smeared precum all over that visor of his making him squirm like crazy the more BuiJay was grinding against him getting more rough with each pass the pre making it easier for him to slide his cock along his visor.

He continued this for a few minutes before slowly pulling his shaft away from JayZel's visor firmly grabbing the base of it soon after doing so, beginning to stroke it right in front of his face while looking down at him with a sly smirk on his face watching his reaction as he put on a show for his brother to watch. JayZel stroking his own cock as he watched his brother masturbate inches away from him.

"How's this bro? Like the view?~"

"I love it BuiJay~"

"Good boy, after I shoot all over you I'll let you pound my ass hard~"

"O-okay!~"

"Right now though, just focus on watching me jerk off~"

"Mmm gladly~"

JayZel whispered in a lewd tone continuing to masturbate as he watched his brother do the same enjoying the view he had, looking up at BuiJay's visor every now and then being met with a horny smirk.

"Hey, eyes down there JayZel~"

"Nah, I like looking at your cute visor as you fap~"

"Get your eyes back down there or your gonna have some one on one time with my crotch~"

"You say that like it's a bad thing~"

"Alright you asked for it~"

BuiJay grabs his head and begins to hind his cock roughly against his visor making his brother squirm like a bitch in the process as he moaned out loud loving the rough grinding.

"Yea that's it JayZel... take it all~"

"Mmmf fuck...~"

"Want it in your mouth bro?~"

"Please... stick it in my mouth BuiJay!~"

BuiJay pulls his shaft away from his visor and strokes it nice and fast before giving him instructions.

"Open up then bro, I'm gonna breed that sexy mouth of yours~"

JayZel did exactly what he was asked to do, opening his mouth up for his brother's synthetic cock which was quickly shoved inside him before BuiJay thrusted it in and out, fucking his mouth like it was his rear as the Synth just sat there and took it loving every second of being used like the Protogen's own personal sextoy gagging slightly with each time his shaft slammed against the back of his throat. As JayZel was being mouth fucked by his brother he started to stroke his pulsing shaft even faster while pushing his brother's crotch closer to his face making him thrust even deeper in his mouth now fucking his throat vigorously as he throbbed inside him leaking pre down his throat while moaning out JayZel's name repeatedly.

The more he thrusted inside the Synth's mouth he could feel his orgasm getting close, throbbing and pulsating like crazy inside his mouth as he was thrusting inside it, moaning out louder and more frequently than before which signalled he was right on the edge of blowing a hot load down his throat.

"Fuck JayZel... I'm so close!~"

BuiJay yells as he keeps thrusting inside his mouth fast and hard leaking more and more pre while doing so as JayZel stroked his shaft as fast as he could while his mouth was being abused by his brother's throbbing cock, seconds away from blowing it's thick load inside his warm and moist mouth. He thrusted hard inside him a few more times, slamming his crotch hard right up against his face before letting out a loud and long moan before flooding his brother's mouth with a big load of warm, thick semen pumping it inside him which he eagerly drank straight away not letting it touch the sides of his mouth and just swallowing each pump of cum as it spurted inside him like the thirsty bitch he was, making loud gulping sounds in the process of doing so. The Protogen pulled his twitching shaft out of JayZel's mouth mid orgasm to paint his visor white like he was planning to do earlier, jerking off as he shot thick ropes of semen all over him completely covering it making him unable to see through the thick puddle of sperm that was being shot on him.

BuiJay's orgasm died down soon after shooting one last small string of cum on his brother, panting heavily as he recovered from this intense feeling of sexual euphoria the rest of his cum dripping down on JayZel's chest as he was trying to catch his breath.

"F-fuck I needed that...~"

"You must of been really pent up bro~"

"Well looking at the mess I just made on your visor I guess I was~"

BuiJay leans down and starts licking the cum off of him swallowing every last drop he collected in his mouth, JayZel giggling as he did this. After BuiJay cleaned off his brother's visor with his tongue he gave him a soft kiss on his "nose" before nuzzling him lovingly.

"You're the best brother anyone could ask for BuiJay~"

"I'm glad you think so bro, now...~"

The Protogen pushes his brother into his crotch and holds him there.

"Give my cock some love then you can fuck me raw~"

"Mmmf... gladly~"

JayZel muffled before giving his brother's cock soft kisses starting at the base and slowly working his way up to the very tip, giving it a little suckle before repeating the process a few times causing BuiJay to moan softly, pulling away from JayZel after several minutes had passed before he turned around and got on all fours on the couch, spreading his ass to present it to his brother fingering himself a little bit to tease him.

"...Breed me~"

"H-holy fuck... with pleasure!~"

JayZel exclaimed with an eager tone, sitting up and kneeling down behind his brother's thick rear giving it a firm spank which earned a loud yelp from him, his hand being pushed away soon after so the Synth could get a proper look at his tight tailhole. Before he pushed his girthy shaft inside him however he shoved a finger inside his tight rear to feel how tight it really was, it felt similar to sticking his finger in a brand new fleshlight almost like his virginity hasn't been taken even though he knew BuiJay was far from a virgin, his tailhole squeezed against his finger as he slowly thrusted it in and out of him making BuiJay squirm slightly.

"Aaah JayZel~"

"Damn, squirming already? It's just my finger bro~"

"I know but it feels so good... you were always so amazing with your fingers~"

"Oh yea?~"

He sinks his finger further inside his anal cavity, massaging his g-spot ever so slightly with his talented finger making the Protogen squirm even more.

"Aaaaah JayyyyZelllll...~"

BuiJay moaned with pure bliss as he fingered him good, not being able to utter a single word the entire time instead making sounds the Synth can't quite explain.

He soon pulled his finger out after another minute of massaging his g-spot firmly, moving his visor down to his anus soon after to rim him, slurping his entry repeatedly to lube him up with saliva slowly licking up and down making BuiJay moan softly. The Synth continued to lick his entry for a bit longer before shoving his tongue deep inside him thrusting it in and out at a swift speed lubing up his anal walls as he grabbed his thick cheeks while tongue thrusting which didn't last much longer, letting his tongue rest inside his anal cavity as he full on ate his ass out practically making out with his rear with BuiJay enjoying himself to the fullest as he let his brother eat him out while continuing to moan softly, speaking out after a few more moans escaped his mouth.

"J-just fuck me already you fucking tease!~"

JayZel chuckles as he pulls his tongue out of the Protogen's tight rear, giving it a firm spank once he done so before sliding his girthy cock in between his cheeks and starting to hump against his rear, hotdogging his cock between his brother's thick ass cheeks.

"No need to rush bro, I'm enjoying myself too much teasing your eager tailhole~

"Mmmf... push it in already... I want you inside me...~"

"Beg for it and I might consider shoving it inside you~"

"Mmm... JayZel please push your thick, synthetic cock inside me I really want you to breed my tight ass... I want you to flood my insides with your thick cum... I want you to make a creampie with my empty hole... it's begging to be filled... please... i want my big strong brother inside me~"

"Hufff... alright bro you earned it!~"

Without further warning he shoved his throbbing synthetic cock hard deep inside BuiJay's eager tailhole, making him yelp in pleasure as it slid inside him with relative ease. He rested his shaft inside him for about half a minute, letting it throb in his tight tailhole as it leaked a small amount of pre inside him a puddle slowly forming in his rear as it throbbed and pulsed inside. Once pre began to pool inside the Protogen's tight sextoy like tailhole, JayZel began to slowly thrust inside him starting off gentle at first but quickly getting faster and more rough as each minute had passed making BuiJay moan out loud as his hole was being ravaged by his brother's throbbing cock pre making it easy for him to thrust in and out of him.

"Mmmf... harder JayZel! Fuck me harder!~"

"You asked for it BuiJay~"

JayZel firmly grabbed BuiJay's hips and went to town, his shaft thrusting in and out of that tight rear of his, the Synth's hips slamming against his rear with each thrust prodding his prostate with the tip which made him moan even louder, grabbing the bedsheets tight as he took his brother's large cock like a champ enjoying every second of his ass being abused, JayZel giving him the occasional spank while breeding his rear. Moans began to fill the room along with constant plapping sounds, both of them loving every second of their naughty intimate moment of brotherly love, the fact that they were both related somehow making it that much hotter with how naughty it felt but in a good and sexy sort of way.

"Oh fuck... J-JayZel... your shaft feels so good inside me~"

"Yea you like getting bred by me don't you bro?~"

"So much... it feels so wrong yet so right...~"

"It just makes our sex that little bit better~"

"You can say that again~"

"I love how naughty you are BuiJay~"

"Same to you bro~"

JayZel gives him a teasing spank on his rear while continuing to fuck him hard, beginning to get close to his orgasm as his cock was being milked by the Protogen's anal walls, his shaft twitching slightly as he thrusted inside of him as hard as he possibly could slamming it inside him making BuiJay moan with each thrust.

"Fuck BuiJay this is it... I'm gonna cum!~"

"Yes JayZel... Breed meeee!~"

It didn't take JayZel much longer for him to go over the edge, slamming his cock hard inside his brother one last time before pumping semen deep inside him, both of them moaning out as loud as they could as JayZel was filled with pure bliss his cock twitching like crazy as it pumped thick ropes of cum inside his brother. The Synths orgasm slowly began to die down after shooting a few more pumps of cum inside the Protogen pulling out soon after it passed, a few drops of semen slowly leaking out of his cream filled anus as he pulled out, collapsing on his brother shortly after staring at the cream pie he made.

"Hufff... that felt so fucking good~"

"You're telling me, JayZel~"

JayZel smirked and wrapped his arms around his brother, cuddling him extra tight while nuzzling him lovingly exhausted from his second and more intense orgasm.

"You're the best brother a Synth like me could ever have BuiJay~"

"Same goes to you JayZel... I love you so so much~"

"I love you too bro~"

He says before giving him a kiss on the cheek and nuzzling him some more as he cuddled him tight, BuiJay happily returning the cuddles and kisses before nuzzling him back as well. The brothers spent the rest of the night cuddling on the couch together both of them slowly drifting off to sleep in each other's arms as the sun slowly sets, both now passed out in each other's arms quietly snoring together and just like every other time they had a naughty moment of brotherly love it brung them closer together