Brotherly Bonding

by CreepyPony

Rating: mature
Tags: Sex, My Little Pony: Friendship is Magic, Thunderlane, Romance, Rumble
Length: 4046

When Rumble is forced to spend the night with his older brother Thunderlane, he soon finds there is little to nothing to do to keep himself entertained. Will he succumb to boredom or will he find something that the two of them can enjoy together?

When Rumble is forced to spend the night with his older brother Thunderlane, he soon finds there is little to nothing to do to keep himself entertained. Will he succumb to boredom or will he find something that the two of them can enjoy together?

Rumble is aged up in this fic to be 18
Warning: Contains brother on brother incest and sexy fun times

Published 2015-02-11 03:00:02 UTC
Last updated 2015-02-11 03:00:02 UTC

Some Brotherly Love

"Uug!" Rumble groans loudly from the living room, laying upon the couch. It was rather late into the evening with the sun resting on the horizon of the sky, it wouldn't be long until it was time for bed.

"Is there something wrong...?" Thunderlane asks his younger, teenage brother with an annoyed expression on his face as he turned away from the TV.

"Yes, I'm bored out of my mind! There's never anything to do over here!" He crosses his arms and stares up at the ceiling.

"You always complain about that every time you come to visit. It's not my fault you have such a low attention span" He sighed and replied with an annoyed tone, returning his attention to the show he was watching.

The young Pegasus frowned and sat up "Well, I wouldn't complain if there was stuff to do. And I don't have a low attention span, there's just nothing here worth paying attention to!"

Thunderlane let out a groan of frustration and turned back to his brother. "Look, there's a big pile of dishes on the kitchen counter if you're that bored!" He spoke loudly with an angry expression before returning once again to the TV, desperately trying to focus on the live wonderbolts show he was watching.

Rumble just rolled his eyes "C'mon, there's gotta be something fun we can do together..." After getting no response, he lets out a loud sigh and plops back down on the couch.

As annoyed as Thunderlane was, he couldn't help but feel just a bit sorry for his little brother. He knew what it was like to be cooped up in a small house with little to nothing to do, and wouldn't wish that torture upon anyone. So, being the somewhat caring, older brother that he was, he came up with a solution. "Fine, after this show ends, I'll let you play some video games. How does that sound?"

Rumble's face suddenly brightens up with a light smile "Yea, that actually does sound fun" Even though Rumble had pretty much beaten every last one of his brother's games with skill that would put even Button Mash to shame, he decided it would be better than doing nothing, and eagerly awaited the show to end.

Around ten minutes later, after the final trick of the show had passed, Thunderlane took the remote control off the arm of the couch and changed the channel. Rumble quickly hopped off and scurried over to the game station underneath the TV with an excited look on his face. He would never admit it, but he enjoyed spending time with his brother, and even considered him to be one of his best friends despite their differences and fights.

”So, what should we play?” The younger stallion asked as he picked up two controllers, tossing one in his brother’s direction, who clumsily caught it in both hooves.

”Oh, umm… I don’t feel like playing right now. I’ll just watch you” He sets the grey controller down beside him and lays back against the couch to get in a comfy position.

”Aww, why not? It’ll be fun!” Rumble attempted to hide the disappointment in his voice as he bent over to look through the collection of video games in a nearby drawer.

”Sorry, I’m just not in the mood…” Thunderlane sighs, looking back up from the controller and towards his brother, only to cover his mouth from gasping loudly at what he saw.

Unbeknownst to Rumble, his tail was flicked to the side as he was bending over, allowing for a decent view of his rear and genitals. As wrong as it was, Thunderlane found himself unable to take his widened eyes off the display before him. The sight of his younger brother practically presenting his He was blushing a deep shade of red as he examined his own brother’s rump, taking in it’s smooth curves and features.

”Heh, what’s wrong, Afraid you’ll lose?” Rumble chuckled, suddenly turning back around with what what looked like some sort of fighting game in hoof. Thunderlane snaps out of his trance a few seconds later, his cheeks still a noticeable shade of red.

”N-no! I just don’t feel like playing right now!” He attempts to hide his blush by looking away from his brother, but does not seem to work as Rumble tries to contain his laughter.

”I can see why, looks like you've been thinking about that mare from across the street” He says teasingly as he pops the game into the console, enjoying the reactions he was getting out of the stuttering stallion. His teasing only caused Thunderlane to blush even deeper.

”Hey! J-just play your game…”

Rumble grinned evilly, returning to the couch beside his embarrassed brother with his controller. ”Gee, what was her name again… I think it was Flitter, wasn’t it?” Thunderlane screams internally as he buries his face into the soft fabric of the arm of the couch. ”Wait, no no... it was Cloudchaser, I’m sure of it” At this point, Thunderlane was more furious than embarrassed with the remarks about his past love interests. He raised himself up and turned back towards the still-laughing Rumble.

”Actually, it’s none of your damn business! Now not another word or I’ll go back to watching my show!” He was still a bit red in the face, but calmed down overall despite wanting to knock his brother out with the nearest blunt objection. Rumble just lets out a long sigh and rolls his eyes.

”Fine, I’ll leave you alone you big, sensitive filly. I just wanted you to play with me” As the loading screen for the game popped up the television, Thunderlane looked down angrily at his brother, as if thinking of ways to get back at him for mention of the mares which must not be named. Then, his mind suddenly flashed back to the sight of Rumble’s well rounded rear from earlier. As much as he didn't want to admit it, he did like what he saw, seeing his own flesh and blood presenting himself like that. He quickly shook his head, cursing himself for even thinking like that. But, at the same time, he did share a deep bond with his little bro… Was it really so wrong to be so curious?

Thunderlane had always been a little bi-curious, surely there would be no harm in doing a few 'experiments' with his little brother. Perhaps if he even played his cards right, the boring night could possibly turn into one of the best either of them would ever have ”You know on second thought, I think I will play with you...” Rumble’s ears perk up after hearing that, and a joyful smile spread across his face

”Really? I thought you weren't interested”

Thunderlane shakes his head as he picks up the controller beside him. ”Well, let’s just say I really need to take my mind off a few things, and what better way to do that then to relax with my best bro?” He grins as he pulls Rumble into a surprise noogie, getting a playful giggle out of him while he tried to break free. Thunderlane eventually let him go, laughing a bit as the sudden attack caused his brother to drop his controller.

”Hehe, now if only you showed that kind of affection towards that mare you were after” Rumble teases as he reached down to snatch the controller off the ground.

This time, instead of growing angry, Thunderlane merely shrugged it off and replied with a playful, flirty tone. ”yea, well all mares come and go. You’re much more deserving of my affection” The comment caught Rumble completely off guard as he fumbled with the controller, dropping it once more. Did his own brother really just say that? He… he had to have just been playing around.

”Oh, am I now? Then does that mean you wanna do with me what you would have done with her?” Rumble tries to imitate the tone his brother was using, his cheeks turning a nice, crimson red as he spoke.

”Well, I wouldn’t say that, but if that’s something you wanna try…”

Now it was Rumble’s turn to be embarrassed. He couldn't believe he was actually flirting with his own brother, even if it was just in a playful manner. ”I don’t know… I’m pretty sure you would make a better mare than me”

”Excuse me?” Thunderlane exclaimed abruptly with a raise of an eyebrow.

”You heard me, you’ve got the hips for it” Now that he mentioned it, Rumble noticed that Thunderlane did indeed have wide hips resembling those of a mare. The observation caused the smallest bit of arousal to spark within the young colt’s mind, a mental image or two forming.

”I d-do not!” Thunderlane nearly yelled, refusing to believe any part of him could even come close to being feminine. He took a quick glance down at his lower, nicely shaped body before returning his attention to his brother. ”Hmpth, I bet thats one of your little fantasies about me, isn’t it? Round hips and a nice, big flank to endlessly pleasure yourself to” You could practically feel the heat emanating from the poor colt as he heard the arousing words coming from his brothers mouth.

”N-no! Why would you even think that you perv!” Rumble was feeling very awkward at this point, but rather curious at the same time. Thoughts of his brother’s hindquarters filled his mind, as he began to wonder just how big and plump it really was. The fact that the two were blood related didn't even concern the curious colt anymore. Just how different would it be from a mare’s, and how much better would it feel…

Rumble was so deep in thought, he barely heard his frantic brother. ”Really now? I think your little buddy disagrees with you!” It took Rumble only a few seconds to figure out what Thunderlane meant. There, out in the open for both to see and stare at, was Rumble’s semi-erect stallionhood poking out of its sheath and resting against his stomach. The little colt was stunned, looking as if his penis had a mind of it’s own and was plotting against him, while Thunderlane could barely keep his eyes off the impressive length.

”Oh sweet Celestia! I-I’m so sorry!” Rumble quickly crossed his hind legs and turned his back to Thunderlane. Without even thinking, he then gripped his member with both hooves in order to cover it up completely. Unfortunately for him, the sudden pressure on his length caused him to sharply moan out in pleasure as it continued to grow in his grip. Poor Thunderlane didn’t know what to think or how to even react to this sudden display of lewdness but one thing was for certain, he couldn’t deny that he was enjoying the sight before him as his own member began to slip out of it’s sheath in arousal.

”Hey, It’s fine. I-I don’t mind..” Just the sight of his little brother sporting a hard-on, not to mention that sexy moan, was enough to turn him on. Looking over at his embarrassed little brother, Thunderlane sighed and slowly inched closer and closer to the unsuspecting Rumble. Looking over Rumble’s shoulder, he whispered as softly and gently as he could.

Rumble let out a soft “Eep!” sound and clenched his member harder on impulse, sending more waves of pleasure coursing through his little body. In an effort to calm him down, Thunderlane ran a hoof over his back, gently rubbing it up and down in a slow motion. Rumble was already feeling conflicted about this whole situation, and it only grew ten times as worse with every move Thunderlane made.

He knew this was wrong, they both did, but there was just something about having his big brother, the stallion who he had known his entire life, treating him this way. It made him feel… loved, appreciated, and happy above all else. He soon came to terms with these feelings and allowed Thunderlane to do as he pleased, leaning back against him as he removed his hooves from around his stiff horsecock.

Once again, the large member came into view for Thunderlane’s visual pleasure as he continued his massage. Now that he was able to get a good look, his jaw nearly dropped to the floor. Rumble was fucking huge for his age. You’d think it would belong to a much older stallion watching it at full mast, the towering horsecock practicly throbbing wth need. He couldn’t but help but groan softly in pleasure, his own cock growing to it’s limit as it pressed and grinded against Rumble’s back. Rumble instantly felt his brother growing against him, which he responded to with a rather lewd moan.

He knew it had to be him that aroused Thunderlane, with his cock out before both of them to stare shamelessly at. Knowing that he was able to turn his brother on filled the young colt with a great sense of pride and joy, as well as adding to his own arousal. But it wasn’t enough. He wanted to do more for the stallion he cared so much about. With a smirk, he turns himself around and faces Thunderlane, looking him dead in the eyes.

Being so close, their cocks press against one another, earning a sharp moan out of each of the lust-fueled stallions. Thunderlane was just a few more inches bigger than Rumble in both length and width, with balls nice and plump, but thats not to say Rumble didn’t have a nice, cum-filled sack as well, his only being slightly smaller in comparison.

”Ooh… R-rumble~” He winced in pleasure as he spoke, much to the arousal of his little brother. With a wide smirk, Rumble suddenly lunged forward and forced the shocked Thunderlane on to his back, the sudden movement causing their dicks to grind against each other.

He supported his weight on Thunderlanes shoulders, moaning softly as he instinctively thrusted back and forth against his brothers cock. Thunderlane made no objections as he and his brother locked eyes, his own hips moving in rhythm with Rumble’s thrusting. His hooves soon made their way up to Rumble’s waist as he held and helped him to keep the steady pace going. The sensation was unlike any kind of sexual stimulation either of them had ever felt before, and it only grew more and more pleasurable as time passed.

”Ooh… a-ahh~ Rumble… No one can ever kn-know about this..~” Thunderlane’s voice cracked and stuttered in between a series of high-pitched moans. He seemed to be enjoying this too much.

”Agreed, we wouldn’t want anyone to know how much of a bitch you’re being right now~” Rumble chuckled as he quickened his movements, now tightly gripping his brothers shoulders as he felt a trickle of precum oozing from his raging stallionhood.

”I am no ones bitch! And I’m not submissive! You’re lucky I’m even allowing y-you to be on to- Gahhh~!” Thunderlane cried out in pleasure as he felt Rumble speed up the pace, forcing himself to grind faster as well. The precum now flowing out of both of them proved to be an effective lubricant as it covered the underside of their lengths and pooled on Thunderlane’s chest.

”Oh really now? I think it sounds like you enjoy being like this~ In fact, I bet you want to kick this up a notch, if you catch my drift~”

Thunderlane’s eyes widened in shock and fear at what Rumble meant. He shook his head frantically in disapproval, despite still moaning like a common street whore. ”N-never… I’m the older brother here, and I’m the one- Mmnuuf~!! -In ch-charge~!” Rumble couldn’t help but laugh at his brother’s behavior, his moans seemed to be getting louder and more needy. Looking over at Thunderlanes pleasure and lust-filled face, Rumble decided it was time to take this to next level.

Without warning, Rumble suddenly ceased his grinding and flipped his older brother onto his back, earning a gasp from the surprised stallion. Thunderlane now lay on his belly, his still leaking cock smooshed between the couch and his belly, staining the cushion below him. He didn’t seem to mind or even notice however as he attempted to further pleasure himself by grinding against the soft cushion, while Rumble was currently taking in the amazing sight that was his brother’s round rear.

Now, Rumble had seen plenty of porn before in his teenage years. In fact he shamelessly spent most nights alone with a computer screen full of smut and a hoof wrapped around his stallionhood. But not once had he ever seen an ass that looked quite as big as his brothers now that it was in full view for him to see. It looked as if those months of slacking off and eating a lot of sugary foods had finally taken its toll on the poor stallion. He wasn’t fat by any means, just a bit more curvy than a stallion should be.

Rumble wasted no time in grabbing each flank with his hooves, taking a moment to enjoy how soft they felt before rubbing each one in a circular, soothing motion. Thunderlane responded by letting out a slightly feminine moan, as well as giving his wide hips a little shake as if to tease his brother. This caused that bubble butt of his to jiggle in Rumble’s grip, arousing him even greater than he already was.

“Mmn… what was that earlier about not being submissive?” Rumble remarked in a seductive voice as he gave his brother’s ass a good, firm spank. Thunderlane cried out in a mix of pain and pleasure, his horny mind beginning to throw pride and dignity behind for the sake of pure pleasure. “Because right now it seems like you’re just dying for me to take take your anal virginity and fuck you senseless~”

Rumble spoke slowly as he continued to massage his brother’s chubby flanks, moving forward closer as he did until his member was aligned with Thunderlanes puckered tailhole. Never before had Rumble been this hard or aroused in his life, and he was ready to pound his older brother until he was overflowing with his semen, regardless of whether or not Thunderlane gave him permission.

Meanwhile, Thunderlanes eyes shot wide as he felt that flared tip press up against his entrance. His mind was absolutely racing. A part of him wanted this all to just stop and save him the embarrassment of being dominated by his own younger brother. The other part wanted Rumble to take him here and now, to fuck him as roughly as possible and make him his younger brother’s bitch. Thunderlane was conflicted, and stayed silent other than the panting and occasional moans.

Rumble was not in the mood to wait any longer for his brother’s response, he needed this and he needed it now. “I hope you’re ready~” Rumble spoke softly as he tightened his grip on Thunderlanes pillow-like rear. These words brought Thunderlane back to reality, and he started to whimper.

“I...I…”

“Shh…” Rumble began to push forward, thrusting into his brothers tight, virgin ass. He let out a loud moan of pleasure as he felt Thunderlanes insides tighten around his tip and top part of his shaft for the first time. Thunderlane also cried out as he felt himself being penetrated for the first time, mostly in pain at first from being stretched out slightly. “I’ll take good care of you, big bro~”

The feeling was unlike anything either of the two had ever felt before, and it only grew more and more pleasurable for them as Rumble continued to fill Thunderlane with the rest of his throbbing member. Inch by inch, Thunderlane felt that massive cock fill his rear until it was completely snug inside him, moaning all the while. “Oh s-sweet Celestia, it feels so big~!” He groaned as his insides were stretched to make way for the long, hard member of his younger brother.

Rumble smirked after hearing this, staying in that same position to give Thunderlane some time to adjust to the new feeling of having a large, throbbing cock inside of him. “I’m so glad you like it~” After a few seconds, Rumble pulled out until only the tip remained inside, only to thrust back in with much greater force. He bit his bottom lip to keep from groaning out in pleasure, while Thunderlane was continuously panting and moaning as Rumble began to thrust in and out a steady pace.

With each thrust, a smacking sound could be heard as Rumbles hips made contact with his brothers jiggling, larger than average flanks. “Mmn, better enjoy it while it lasts. I've got a feeling I’m not gonna last long in this tight ass of yours~” It was a beautiful and erotic sight for Rumble, but he knew he would blow his load in no time if he kept staring. He attempted to keep his head straight up and look forward, no matter how badly he wanted to watch himself pump in and out of that plump rump.

Thunderlane, the once confident and supposed manly stallion that he was, was loving every thrust his younger brother put into him, moaning out louder and louder as he practically begged for more. His stallionhood was harder than diamond and would not stop throbbing and twitching as he spilled pre everywhere over the couch. His thoughts were clouded with lustful desires as he became completely absorbed in pleasure, which could only be satisfied by his own kin. He soon found himself rocking his plus sized hips back against Rumble in time with his thrusts, forcing that big, thick cock he loved so much deeper inside him.

“Oh fffuck~!” Rumble cried out at Thunderlanes action, feeling that much closer to orgasm. He could not help but go even faster, gripping that bouncing ass as tightly as he could. “G-gonna fucking flood this ass with my cum~!” Rumble spoke through gritted teeth as he fucked his older brother faster and harder with each passing minute. His member was a blur as their swollen balls repeatedly slapped against each other. “Damnit, I c-can’t hold it in!”

“Well f-fucking do it then! Fill me!” Thunderlane turned his head back towards Rumble, his eyes half lidded and tongue hanging out the side of his mouth as he felt that familiar feeling quickly rising. It only took a few more powerful thrusts, and Rumble soon cried out in pleasure as his cock erupted inside of his brother. Long, thick strands of hot seed shot out like bullets as Thunderlanes insides were painted white and filled past the brim and down his taint and balls.

The feeling of warmth was too great and Thunderlane soon blew his own load, his cock twitching violently as he covered both his chest and the couch in his hot, thick spunk. Rumble was still cumming like crazy when he finally pulled out of his brother, the remaining strands coating his oversized rump while his abused hole was leaking with seed.

Once both their orgasms subsided, they plopped down one at a time, each completely spent and panting softly. Thunderlane collapsed into the puddle of his own spunk while his brother plopped down on top of him. There was pure silence for a few minutes other than the sound of their breathing, until Rumble decided to break the silence.

“Hey… Thunderlane?”

“Yes, Rumble?” The stallion asked as he enjoyed the warmth and joy of having his brother so close to him.

“You’re a fag” The younger stallion chuckled weakly, still managing to make a joke at this time.

“Well, you’re a bigger one~” Thunderlane replied weakly as he attempted to catch his breath.

“Oh, and umm… is it ok if I stay a few more nights? I think I’ll be able to keep myself entertained~” Rumble smirked to himself as he cuddled up next to his brother, eyes slowly closing.

“Hehe, indeed, we’ve made quite a mess that needs cleaning, but that’ll have to wait till the morning. For now, we need our rest.” Thunderlane whispered, nuzzling his little brother as he followed suit, the two soon fast asleep.