The Old Assistant
When I was younger, I used to enjoy visiting the library.
Our town actually had one of decent size, which in turn meant a decent selection for my niche interests--mostly art books and the Far East. I'd often spend the weekends browsing, stacking up piles of books to check out, and burying myself in them during the week.
Those were good times... until my dick started growing in.
At first it was just embarrassing. I'm a taur dog; people are used to our junk being out. Even being well hung wasn't so much a problem, though the increase in random boners one gets as one enters puberty was a bit of an obstacle.
After a while, my dick had grown so it was bigger soft than it had ever been hard. People said not to worry about it, but I'd still try to cover up with a blanket if I was heading out into polite society.
By the time I was getting done with my schooling (and that's a whole different story) there was never any hiding it again: my dick always stuck out between my front legs.
And about halfway through college it'd grown to the point where I couldn't even walk anymore, the girth of that massive shaft keeping my legs from ever reaching the ground.
There were no more leisurely trips to the library.
When I finally ended up with a place of my own, I made sure I had a room dedicated to the storage of books.
I do know that there's Internet now and all that, but... I just feel like some experiences can't be replicated on a screen. And not all the older books are online yet anyway.
Anyway. Today was a day I was tired of lying in bed being an immobile lump, so I rolled myself onto my little accessibility cart and trundled myself across the house to my library.
And there was Marshall, my old assistant, being helped into a chair by my new assistant.
"Mister Alto!" Dino said. "I was just coming to get you. You have company."
"So I see. Can we have some time alone?"
The wolf nodded, and left.
"Marsh," I said.
The polar bear looked up at me, half as though he wanted to cry. His belly had gotten enormously huge since last I saw him--well, since last I saw him unbloated by copious loads of cum, anyway. He only looked up at me, eyes pleading, and didn't say anything.
I rolled a little closer to him. "Sweet marshmallow. Are you all right?"
"I'm sorry," he said. "I didn't know how to tell you..."
There's a terrible sinking sensation that comes over you when a loved one indicates they have Something Serious to say but doesn't tell you how worried you should be.
"What happened?"
He half turned to me and rested a paw on his belly.
He was silent for a good full minute, despair deepening in his face the whole time.
"Marshall..." I said, pulling beside him so I could put an arm around him. "You don't have to be afraid of me. I still l--"
"I'm pregnant," he said.
I wasn't sure what to say. Clearly he was not looking for congratulations.
"They're yours," he said.
I wasn't sure what to say. To call me surprised would be an understatement.
"It's... not the first time," he said.
I wasn't sure what to say. Marsh had told me he'd never had children before.
"I don't want to--not again--"
I held on to him as tightly as I could.
"But they're yours too and I didn't want to--"
"I still love you, Marsh."
He stopped trying to explain for a bit and just leaned into me, letting the emotions out without words.
The pronoun, however, had stuck in my head. After he'd calmed down a bit, I asked: "'They'?"
"Um."
"'They' meaning twins?"
The polar bear shook his head.
"Triplets?"
"No..." He covered his face.
"Gimme a number, babe. Are we going to be octodads?"
"There are--there's not an exact number but from what they could tell on the ultrasound... there's at least thirty-seven pupcubs."
I looked over his swollen belly. "For... thirty... seven... pup... cubs... you're... remarkably petite."
"Oh, I'm not far along at all... the most recent were probably conceived last time I was here. Not even a month ago. But that's part of why I'm here today. Tomorrow's the last day that I can... um..." He covered his face again. "...decide to keep them. And I didn't want to do anything without your input."
I thought about it. "Thirty-seven kids sounds... difficult."
"You already get an assistant for your... immobility. They'll allow us more assistants if hyperfertility becomes a hardship as well."
I rubbed my paws down his gut. "This is... really all me?"
"Fill a guy with enough swimming pools of cum and you'll overpower his birth control, yeah."
"Thirty-seven kids..."
"At least."
"There could really be more?"
"Right now, not many. But, if we were to do it again..."
He turned to me with eyes strangely needy after the emotions he'd been through.
"I'm already going to be fully immobile by the time the oldest comes to term." He closed his eyes, rubbing his stomach. "If... if you keep on fathering... I may never move again."
His voice shook with hunger. I let him keep talking.
"I... I know it's scary. I've never... never been close enough to anyone who wanted to do that for me. To keep me bred at all times. It... it's the way I'm made, though. It's... what I need. I'm... I'm sorry I didn't tell you before."
I leaned into my polar bear. "You're my marshmallow," I said. "No matter what. I don't... I don't know anything about kids. But I guess nobody does, to start with. I do know I'll do what I can to help you live your dream. Because... having you here with me always... not just as my assistant... that's my dream."
He looked into my eyes. "You mean it? You're not just... saying that?"
I slid off my cart and straddled him where he sat in his chair. "No, I'm serious," I said, grinding my sheath between his legs, soaking him with pre as my dick emerged. "It's a hot idea and I don't think you get to leave this room till you've got at least another half-dozen buns in that oven of yours."
Marsh struggled to get out of his pants before my arousal tore them to shreds. I stepped back, smelling his musk as it grew well out of proportion with his undersized junk. I knew, now, that this wasn't just the smell of a sweaty crotch--this was a bear in heat.
As soon as he was properly disrobed, my growing shaft was already pushing against him, soaking him with pre. He struggled to get himself in a good position to take me, which looked like a hard thing to do while heaving around such a massive taut gut full of... our young.
"I'm not... gonna crush or drown 'em or anything, am I?"
"Nah," he said. "A breeder's body is built to protect."
My surging cock hadn't even waited for the answer though, its massive girth forcing itself under the polar bear's tailnub. The precum that coated my shaft had its usual effect on his body, allowing it to stretch to impossible proportions.
Marsh had had a lot of exposure to it, allowing him to slip onto my cock as easily as a condom, regardless of how far it forced his hips apart and made his rib cage bulge.
Damn, I've missed my teddy bear.
He moaned softly as he was stretched out by a dick bigger than he was, the polar bear little more than a thick furry wrapper around my cock. I grabbed hold of his legs as he started losing leverage, and felt my dick grow even fuller and harder as I pulled him further and further on to me.
My precum was already starting to bloat out his features.
"My little marshmallow... I'm going to breed you again and again... so full of pupcubs, no one will be able to tell whether your gut is bloated with my young or my seed..."
Marsh whimpered with need--or at least attempted to; with the way my massive shaft was deforming his body, it came out as more of a distressed squeak.
I tugged at his legs, pushing in inch by inch as the warmth of his insides surrounded me. Would I even be able to last very long? I felt like I hadn't gotten off in ages... even though it had really only been the night before.
I kept pulling him onto my dick, till finally I felt my forming knot pressing at the base of his tail.
Today I knew I wanted to knot him.
I'd never knotted anyone before, but I felt it was the right thing to do, for the bear I loved: my physician said it'd probably triple my output. The library was a pretty open space, so I figured I'd have room.
I felt the bear's tight ring open up further as I started to force my knot into him.
Even with magical stretchiness, it's not easy to cram something the size of a small car into someone's ass. I was gripping Marsh's legs tightly so that the seven feet of cock (and counting) that was pushing into him didn't take him out of reach. My knot was slowly filling up the space under my legs as it continued trying to slip out of my sheath. And I kept holding on to my bear in hopes that the knot would just... slip in if I held him in place.
But it definitely wouldn't be easy. Marsh's ring was tight--he used to try taking my knot all the time, but it had been a few weeks without the practice and I could tell.
Still, you've gotta go inch by inch. And inch by inch I pushed and ground into the bear's hole, feeling the tightness of his ring slowly give way as I worked on going deeper into anyone than I ever had before.
If you've ever had to deal with having a big dick no one can usually take, and then one day find someone brave enough to take it--even though they squirm, you just want to slam it in just for the relief.
If I had anything like the leverage, I'd be pounding this bear as hard as possible. Instead, I was stuck with the game of inches. Which isn't to say I wasn't enjoying myself--the warmth of the icebear's insides all along my length, the way I could feel his pulse throbbing alongside my own as I gushed pre into him, the ever-stretching, ever-tighter ring sliding onto my knot as I kept pushing into him--I was damn well ready to blow already, but trying hard to hold back for my bear.
Still, my arms were aching from the effort of holding him, and I took a moment to stroke what fur of his I could reach.
"Sweet marshmallow... I'm going to keep you so full of cum and cubs..."
A shiver along my length, and a soft moan of appreciation on his end--as full of cock as he was now, coherent speech was out of the question.
"...gonna stretch you open so wide... sexy breeder bear... you'll take my knot every night... we'll keep you good and loose and begging to be filled..."
I took hold of my bear's legs again and gave them a good hard pull, feeling my knot push in deeper, stretching him open further. "Fuck..."
It felt like I'd never be able to fill him. He was still too tight today.
And then there was a throb of my knot as his hole squeezed me, and with a bark of shock my knot popped into the bear with a wet schlock.
How did that even happen? I was sure we weren't even close to the thickest part of my knot.
The tightness of the bear surrounded my whole length, from the tip where my pre was building up in his head and gushing out his mouth all the way down to where that distressed ring gripped the base of my cock like a vise, locking my monstrous knot in place.
The pressure forced me to climax immediately. With an audible rumble like a drain being flushed, cum powered down the length of my dick, unloading into the upper end of the bear. I watched Marsh's body swell with my boundless seed, growing rounder and more sloshy along my length, till with a loud splat a streak of white was splashed across the bookshelves along the far wall.
My heart stopped for a moment, in fear that I'd burst my bear, but I immediately heard him coughing, struggling to keep down the load that was blasting into him.
He didn't have much luck. The next shot went straight through him, as did the next one, and the next five after that--quite a lot of my books were going to be ruined, but at this point I didn't care. I leaned forward, putting my weight on my buried knot as Marsh managed the strength to hold his maw shut.
I felt my balls churning as my climax continued, a heavy constant slosh of cum filling my bear and rounding him out like a balloon. The weight of his bloated body pulled my cock downwards and he was soon face down on his gut, resting on the floor, and expanding to fill the room.
At this point the growth of his body had already submerged his limbs and head into the swelling furry ball of cum. He expanded along the floor until he hit the far wall, at which point the pressure on my still-pumping shaft started pushing me backwards.
I tried to think through the fog of bliss. I wasn't going to stop cumming anytime soon--the library would be trashed at best--and at worst the swelling polar bear would be knocking down walls and crushing the house as he filled with the weight of my seed.
I really did think of trying to stop it. But at the very first attempt I saw it'd be impossible to get the bear off my knot--not least because my body was now pressed against the shelves and I couldn't reach my dick in the least.
The room-sized bear filled my world alongside my endless climax--the throb of the swelling bear as he continued to grind me into the books and the deep hollow slosh of an ocean of cum only barely contained by a thin layer of hide competed with my pulsing shaft for my attention.
Marsh had filled the room. Not that I could see it--my view had been obscured by the endless expanse of white fur for a while now--but I could feel my dick struggling to pump out more of its seed, and I heard the sound of the walls cracking from the pressure.
I hoped that Marsh's bulk would protect me from the collapse of my house.
I guess we'll find out, I thought, as the wall I was being crushed against gave way.
What happened next was a confusion of fearful crashes and escalating pleasure as my dick, no longer held back by the restraints of the architecture, really began to fill my bear. The fog of bliss returned as the immediate danger passed and I was buried under a still-growing expanse of white fur, dreaming of how many cubs I might be fathering, until I felt hands on my shoulders.
I snapped out of it and looked into the face of a lion in firefighter's gear, with Dino behind him. "I called for help... you didn't seem to be stopping..."
"We're going to have to get you out of here," the lion said. "Or we're going to lose more houses than yours. You're already disrupting traffic."
He tried to pull me backwards, but my knot was too firmly lodged for him. More hands joined in, and with the effort of six firefighters the tie was broken, a gush of cum from Marsh's ass drenching us all before the bear's hole closed back up with admirable resilience.
Without the stimulation, my orgasm quickly died down, and the firefighters helped me get out of the way as more emergency crew started rolling Marsh off the street and onto the confines of my property. After the street was clear, they set up a big circus-like tent over the cum-filled bear for shelter and called it a day.
I walked around the several-stories-high fluffball till I found the place where his head was, deeply buried by his bloat. "Are you all right?" I said, reaching in to stroke behind his ears.
When he tried to speak it was a little burbly because of all the cum that flowed out when he opened his mouth, but it definitely sounded like "I love you." I returned the sentiment.
"So, thirty-seven pupcubs so far," I said, sitting against him and stroking his hide. "I bet this is good for at least ten times as many. And if you get this big every time I breed you even before your womb's full to bursting..."
The bear's squeak was half desperate, half need.
"...we're gonna need a way bigger house."