FSE

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Passed out in his gaming chair, Boone snored. The noise echoed in his ill-furnished room and into the hallway from his open door. The black-furred wolf glistened in the light of the monitor, revealing his bare body and the glean of his male fluids on his paw, his legs, and on a small puddle on the ground in front of him. The years of construction work showed on his muscled silhouette and the musk of a hard day's work along with his sexual fulfillment still lingered in the air.

Sam peeked from the hallway, unable to turn away from his older brother's beautiful naked body. The teenager had been raised by his older brother for a few years now, but he had a hard time thinking of him as a brother. Even as he sniffed the air and caught the scent of his older sibling, his desire beckoned him closer.

A faint sound of dialogue echoed through the room from a pair of discarded headphones. As Sam drew closer so too did the smell of alcohol. If it was anything like the time Boone had passed out drunk on the couch, he wouldn't have been able to wake him up if he tried.

Sam took a closer look at his naked brother. He carefully began caressing the sleeping fur's stomach. The snore did not subside from his increasingly firm pets. Confident, he began to lovingly stroke lower at the flaccid member beneath.

It was six inches as is. He was always curious how big his brother was. He'd caught glimpses on accident throughout their youth and since. He was always transfixed by it. He watched it grow in his grasp now that it was finally here in his paws. As it hardened, he licked his chops hungrily. Getting down on his knees, he let out a sigh of satisfaction as his muzzle took his brother's length into his warm mouth. The taste of cum, sweat, and male exertion immediately sent his body into overdrive. He bobbed up and down on the swiftly enlarging member, stopping only to catch his breath once it reached its full length. He took a ruler from the office desk and measured it against the impressive malehood. “Damn. 10 inches," he groaned, lapping at it as he stroked at his own neediness below him.

Sam was far less well-endowed. Sitting at a mere 3 inches fully hard, he'd always been jealous of the brief glances he'd caught of his big brother. Two fingers were all it took to start rubbing himself effectively. He would've preferred to fuck his brother directly but he was too small to get any real penetration. How he wished he was as large as his brother.

The younger wolf let out a grunt, already at the edge of orgasm after barely touching himself. Knowing that he wouldn't last long, he buried his muzzle on his brother's cock, essentially deepthroating himself against the developing knot. With his muzzle full of his brother, he spasmed and jerked, a single speck of cum dripping onto the floor.

Sam then fell back, taking a fresh gasp of air. From his laid back position, he could clearly get a view of both of their penises and how badly he stacked up. He whimpered pitifully at the site of his barely visible knot and the tiny speck of semen he'd produced. Meanwhile, his brother had produced a sizeable knot and was producing dribbles of precum from his saliva-laden penis.

The snore stopped momentarily and Sam held his breath, not wanting to be caught naked in his brother's room. Boone shifted ever so slightly in his chair and immediately fell back asleep. The small adjustment had left the room deathly quiet save for the noise emanating from the fur's headphones.

After calming down from his near-death experience, Sam walked over to the headphones and listened a bit closer. The sounds of a canine moaning in pleasure caught his attention, amongst various other strange overlapping noises. His attention was drawn for the first time to the screen where there were quite literally dozens of tabs open, each with some sort of porn active.

Sam blushed, wondering whether he should invade his brother's privacy like that, but he was curious as to what got his big brother off.

Standing naked in his brother's room, he began cycling through the tabs, noticing that his brother wasn't quite as straight as he was led to believe. While there were a few videos involving women, they were either wearing a strap-on and pegging the man or it was a cuckolding video.

The videos had a common theme in that it was always the larger partner as the bottom. Even in the cucking videos, it was the larger of the two males that was being cuckolded.

But the gay videos were far more interesting, particularly for Sam who considered himself exclusively homosexual. It was where the more extreme fetishes came out. Large males being humiliated by smaller ones. Being put in chastity, forced to act like ferals, and in more than a few cases, spanked and put into diapers.

Sam had to do a double take at his brother. Really? His brother was into this? The manly construction worker? The beer-drinking, sports-loving, weight-lifting, female conqueror was into something this humiliating? He needed to know more.

He went through his brother's computer, looking for a suspicious folder which would've indicated porn. Having had experience in sleuthing this way with other friends, he found a library of artists renditions of all manner of humiliating situations for muscled men. Of specific interest to Sam was a subfolder labeled "my writing."

The young wolf had to stop himself from laughing. The older wolf hadn't bothered to be coy at all. The names of the furs in these stories were all people he knew. Drinking buddies, former teammates, coworkers, and even some of his own high school friends. Moreover, the main character was always a black wolf named Coone that was the one being humiliated. When he got to a story that had his name, his heart started beating quickly.

"Sam strips off Coone's boxers, revealing his minuscule penis. 'Little brother,' he cries, 'no!' Sam pulls down his own pants, revealing his hulking member and frots it against Coone's, comparing the two. 'That little kiddy dick belongs in diapers,' he taunts. Sam snaps a picture and shows it to Coone, threatening to show his coworkers if he doesn't obey. Whimpering like the baby-dick he is, Coone gets on his knees and begins sucking at his little brother's gigantic penis."

The younger wolf barely noticed how hot and heavy his breaths had gotten. It was uncanny that they were into some of the same things despite never having talked about their fetishes or engaged each other in that way. He huffed in displeasure. He wished he had a big penis like in the story. If he did, he'd be much happier being on the dominant side of things.

Then again...he had a dragon friend who owed him a favor. He'd have to cash it in.

---

"What are these?" Boone asked, questioning the pair of cartoon briefs given by his brother. The design on them was some child's show that he didn't recognize. At first, he didn't think they'd fit, but as he picked them out of the box, they almost seemed to have gotten larger.

"It's a pair of matching underwear," Sam said, revealing another plain blue pair that was already out of its package.

Boone raised his eyebrow at his little brother. "These aren't matching at all. Mine look like underoos meant for a large child whereas yours are normal boxers. Nothing about them is the same."

Sam shrugged his shoulders. "I think you'll like them once you try them on. I got them from a friend of mine who owed me a favor."

"No way in hell am I wearing something so humiliating," Boone replied. "Thanks for the gift, but it's staying in my closet." With that, the older wolf walked off to his room much like he did every evening.

The young wolf smiled. His older brother could lie all he wanted. The bulge forming in his pants told a different story.

---

In his room, Boone closed and locked the door behind him, beginning to strip down. He hated that he needed to be so dickish to his little brother but he'd practically raised him. His little brother could never know his true feelings.

He took a whiff at the underwear. They were completely odorless, which was almost a disappointment to the wolf who was wearing them like a muzzle while he continued derobing.

His cock was already throbbing in need and he was fully erect by the same he managed to get all of his clothes off. Suppressing his pleasured gasps, he took the underwear from off his muzzle and began putting his legs through the holes, imagining himself being forced into them by his little brother.

Through the white cartooned fabric, he rubbed at his large penis and made his way over to his computer where he pulled up a new document. As he typed away, he began saying parts of it out loud.

"Aren't these more appropriate for a baby dicked-loser like you?" he echoed quietly, his paw furiously pawing away at his penis inside the underwear. It often took a lot for him to cum. Often times, he'd need to paw at himself for close to an hour to be able to cum. Writing stories served as a way to keep his libido going while he did it.

"No, keep it on. It's not as if your pathetic little shrimp cock is going to make a mess in it," he said with a moan, the precum staining the front of the briefs as he continued with his story.

"Yes little brother. I'm your little peepants sissy," he said, whimpering as he desperately humped against his paw. Something was wrong, but he didn't know what yet. He was much closer to cumming than he usually was by this point. And was his penis getting flaccid? It wasn't filling out the fabric as much as it had just moments earlier.

A knock on the door distracted him from those thoughts. He thought to start fake-snoring, but to his surprise, his brother simply walked in to his supposedly locked room. Still in his office chair, Boone pushed himself further into his desk to cover his very erect and humiliating boner. "Get out!" he whined, a little more submissively than he'd intended. He was still in the headspace of the story and his head was light from all the blood that had flowed to his oversized penis as often happened.

Sam was wearing only the pair of boxers as he strode into his older brother's room confidently. "Not yet. I want to see how they look on you," he intoned, pointing at his older brother's crotch and winking.

Boone flushed with embarrassment. "That's not..."

"Shhh, come on. We're brothers. I just want to see," Sam uttered, making his way slowly closer to his older brother.

"F-fine," he stuttered, rolling out the chair and standing up before sitting back in the chair and rolling it around so that he was hidden. "Now get out."

"Whoa whoa. Not so fast," Sam said, spinning the chair around to forcibly bring his gaze towards the wet spot on his brother's crotch from the precum. "I can't leave now. I'm curious."

Boone tried rolling back away but his brother kept pace with the chair. Very suddenly, the seat was backed up against the far wall and his little brother reached down at the waistband of his briefs, giving them a playful snap.

Sam smiled and his digits began tracing at the fuzz of Boone's navel. "I've read your stories you know. You're quite popular on all the humiliation sites."

The older wolf blushed deeper than he ever had before, letting out an uncharacteristic whimper as he noticed his erection diminishing inside his briefs. But why was he getting so horny at the same time?

"Why don't we whip it out to see who's bigger, huh? If you're bigger, then I leave you alone," he said, fingering at his own waistband without revealing what was underneath.

Boone knew he was bigger. He'd seen his brother naked many times in raising him. In fact, he was certain that even if he jumped in a freezing cold pool, he'd beat his little brother. And this was the exact situation he wanted to avoid with the arrogant persona he adopted around Sam. "Fine. Deal."

"Good of you to agree before you even know what I get if I win," Sam said, slowly lowering his boxers.

As the fabric descended past Sam's balls, Boone knew something was wrong. Not only were his balls much larger than he'd remembered, but the flesh was so thick at the base. And why was it hanging down? It wasn't big enough for that. It was supposed to be so small when it was soft that it resembled a baby's penis. Was it a trick?

Inch by inch, Sam lowered the boxers. Inch by inch was revealed and as the tip was in sight, the younger wolf jerked them down and stepped out of them. Could he be as big as him? He couldn't have possibly gotten that big in such a short amount of time.

Meanwhile, Boone didn't feel right. He was far hornier than he'd ever been. He was on the verge of cumming just from seeing his little brother's huge penis. Could his little brother actually be bigger than him? Fuck. It was so hot.

"Your turn," Sam ordered, helping his older brother out of his chair.

Boone reached down and paused. Was he flaccid? He couldn't feel his penis anymore. When he looked down, the smallest nub where his penis was could be seen. There was no way that he'd gotten that shrunken when he was so horny.

Sam didn't let the older wolf stop. In a sudden movement, he pantsed Boone's humiliating briefs to the ground, revealing what appeared to be a 1-inch nub with a matching pair of tiny balls. "Awww, isn't that cute?" he teased, putting the tiniest portion of his thumb and forefinger to it.

Just that slight sensation was enough to cause Boone to quiver in excitement. "B-but," he moaned out. "What happened?"

Of course, Boone had no way of knowing that the underwear temporarily drained one set of genitals and delivered the mass to the other. And by the looks of it, Sam had stolen more than he had to give.

Sam bent down and intentionally squinted, grabbing the ruler from the desk and pushing it against Boone's crotch and lining up the marks. "Tsk tsk tsk. Just shy of 1 inch. Your turn to measure me."

Boone let out a pitiful and desperate cry as he could feel himself nearly orgasming from the mere touch of the side of the ruler and his brother's fingers. As he was handed the ruler, he got on his knees and delicately pressed the edge to his brother's crotch, being careful not to touch his penis.

"Not so fast," Sam ordered, taking his length into his paw and bringing it to Boone's mouth. "It's not exactly fair if I'm not hard where you so very clearly are."

"I think it's obvious you w-" Boone started to murmur until his younger brother's penis was shoved into his muzzle mid-sentence.

"That's a good little baby. Or should I start calling you baby brother? Do it properly or the conditions I ask for are going to get worse. You agreed without even waiting to here what those were, after all."

Boone couldn't help it. A shiver ran up his spine and he had to resist orgasming as his brother shoved himself into his mouth and began degrading him. This was what his stories were about. Wasn't this exactly what he wanted? This had to be a dream. To that end, he compartmentalized the rational side of his brain that knew otherwise and began sucking Sam off.

"Good girl," he praised, petting his older brother and essentially face-fucking him. "Get your big brother nice and hard for what's coming up next."

The knot began developing and it was getting harder to breathe, but despite his insistence to the contrary, Boone had practiced this sort of thing before. He was able to get in breaths when he needed to, allowing his younger brother to use him. All the while, he had to clench his insides from the pleasurable sensations that were developing inside of him, beckoning him to release his seed.

Sam then pulled out, handing the ruler back to Boone. "There. Go on," he said with a smug expression and the much larger penis in full view.

Boone's eyes went wide. Had he really taken that whole thing in his mouth. His hands shook as he started measuring from the base. At first, he hesitated to touch his brother's penis but then realized it had just been inside him. Firmly grasping it, he lined it up with the ruler. It went slightly past the edge of the 1 foot mark. "12 inches..." he moaned out.

"Beg for it," Sam uttered.

"What?" Boone asked in disbelief.

"You heard me. Beg for it."

Boone stared with hesitation up at his younger brother but the smell of his penis was driving him crazy. "P-please."

"Please what? I know from your stories that you know what you're supposed to say," Sam asked after a moment of silence. That penis was shoved against Boone's muzzle, forcing him to deeply take in the scent.

"Please give me your humongous cock, big bro!" he whined out. And it was too much. Whimpering, he visibly shuddered as the smallest speck of liquid appeared at the tip of his micropenis, cumming from the humiliation alone.

"Good girl," Sam said, bringing his finger to rub at his older brother's spasming tip, causing the iota of juice to lube it up. In the spasms of his older brother, he guided the male to his bed where, in his desperation, he was easily thrust into a bent over position. Not wasting any time, he began forcing his saliva-lubed tip into his older brother's ass.

The moan that came out was very much feminine. Boone wasn't a virgin. He'd had numerous toys up there and even the occasional anonymous fuck. But the largest toy he owned was only as big as his 10 inch penis should've been. This was 2 inches beyond that. His prostate groaned in agonyingly pleasant bliss as the engorged member rubbed up against it causing his spasms to renew almost like a second orgasm. Unprompted he cried out, "please fuck your baby-dicked little brother."

"I plan on it," Sam groaned. He was very much loving this. He'd always cum too quickly in the past. The feeling of his brother's tight but welcoming insides would've been too much for him to bear. Instead, it was simply a pleasant sensation as he began slamming the base of his knot into his older brother.

Boone's tongue hung out in apparent euphoria as the base of the knot hammered against his insides over and over. Sam was being rough in all the ways he liked. Whats more was that his body wouldn't stop feeling the afterglow of his orgasm. With each thrust, his penis only felt harder and the orgasm only intensified. He'd never experienced a prolonged climax like this.

"Roll over," Sam commanded, "I want to see your tiny winkle dick while I fuck you." His penis vacated Boone's insides and he began rolling him over so that his legs were in the air.

"Yes sir," Boone responded, using his core strength to keep his legs elevated and off of his smaller statured little brother. The elevated profile also gave him a good look at his shrunken penis. The tiniest bump could be seen where the knot should've been and his balls had retracted so tightly to his body that it just looked like more skin beneath his fur. And he gasped for air, his tiny penis spurting weakly.

Sam had very suddenly slammed his knot in with his reentrance. Now tied with his older brother, he began gyrating his hips, forcing that large bulge to tug at his insides.

"F-fuck," Boone whispered, biting down while his body screamed in sensation. "F-fuck me harder. Please."

"As you wish, baby-dick," he growled, tugging with all his might as the knot slowly began to pull out. And as soon as it left, he slammed it back in. Then out. Then in. With each repetition, the effort necessary to force his knot in and out dwindled and then he was back to fucking him as he had before.

The muscled wolf let out all manner of blissful utterances, experiencing a deep level of satisfaction that he'd never had before from simply being fucked. "Oh please. Breed me. Give me your puppies," he cried in a feminine tone, grasping the sheets while he did his best to stabilize his swiftly wagging tail beneath him.

Sam leaned forward with all of his strength, embedding the knot further than he had initially. He used that opportunity to steal a kiss from his older brother, lapping at the wolf's muzzle and forcing his tongue against his as he said between kisses, "coming right up."

Boone accepted his brother's kiss with eagerness. And that passion intensified when his insides exploded with warmth. His little brother's cum plastered the insides of his anal walls. Like a hose drenching a burning fire, he felt relief while each wave crashed against his deep intestines with surprising force.

In the aftershock of his orgasm, Sam slowly humped himself against his older brother, milking himself and causing bits of the residual juice to trickle out into Boone. He broke muzzle contact, rearing back to pet at his older brother's stomach and pull out the knot. "So how long is it before you can cum again, usually?"

Boone blushed, still quite horny despite his prolonged orgasm. He still needed to sort out his emotions, but that could be later. He wanted more. Right now. "I dunno. I kind of want to go right away."

Sam smiled, "that's how it was before I got us this underwear." He pointed towards the discarded undergarments and waited until it clicked in Boone's head. "It'll last for another 23 hours or so. So...how long have I got before I can expect to go again?"

The older wolf smiled, coming to a sudden relief and understanding knowing that the change had been temporary. At least some part of him had feared the worst. "Probably an hour or so, I'd guess."

Sam walked over to the door and opened it, revealing a duffel bag. He brought it in, not bothering to close the door. The first thing that came out was a vibrating butt plug. The second was a chastity cage perfectly fit for his brand new diminished size.The young wolf made no attempt to hide the various other humiliating objects within. "So, we'll just need to keep you occupied until then."

Boone initially started to protest. He was regaining his clarity of mind in the absence of his male heat. As Sam forced the buttplug in and turned it on, he whimpered in need. What's a day? It can wait. As he eyed some of the more tempting items in the duffel bag, his mind started to wander to kinky places. Maybe it could wait longer than that, even. Right. They'd talk about it...eventually.