Filling My Brother
Chapter 3
By WaffleSquadron

“See, didn’t I tell you I found something amazing?”

“No.  You told me ‘Oh-my-god-dude-you-need-to-come-over-right-now.’  I had no idea what was so important,” I replied.  

That wasn’t exactly true.  Tuesday afternoons at Peter’s place pretty much always meant porn.  His parents were still at work, and his older brother Joe had practice after school.  That left a perfect window for two horny fourteen year olds to take advantage of.  The fact that he also had a computer with access to the internet probably helped a lot too.

“Whatever!  I found actual morphic porn, you know how rare that is,” Pete said.

“I will say: this is the hottest video I’ve ever seen,” I said.

It really was.  We've been best friends since second grade, and jerk off buddies since fifth, and we’d never found more than a few nude pictures of a non-human girl before.  Now we had a full video of a huge Husky guy fingering and licking a skinny Poodle girl.  It was like a dream come true.

“Oh man look at him go.  He’s eating her out so hard.  Aww dude I gotta jerk off right now,” Peter said, his voice getting deep.

We weren’t exactly shy around each other.  Pete pulled down his pants in a flash and started rubbing his sheath.  I could see some pink peeking out, but something else caught my attention.

“Dude did you get more spots down there?”

Pete was a Dalmatian, and it was always fun to bug him about the black spots on his otherwise white coat.

“What? No, I told you before we don’t get more spots after like, age eight,” he said.

“I dunno.  I think I see some more black on your sheath,” I teased.

“I think they are just getting bigger.  Whatever puberty is weird.  Now quit staring at my dick and take your pants off.”

He didn’t need to tell me twice.  I dropped my shorts and got down to business.  My dick was already peeking out before I'd even touched it.  Watching the girl on screen get her pussy stretched open with every thrust was really hot and pretty soon both of us were fully hard and unsheathed.  We started jerking off, side by side, and our eyes were totally focused on the action in front of us. 

“Shit dude, she is so much hotter than those human girls.  Can you imagine how good that pussy would feel,” Pete said.

I could do a lot more than imagine, but left that little detail unmentioned.

“Oh man I’m getting close, this is so hot.  Squeeze my knot dude, I’m gonna squirt,” Pete said, his voice strained.

We’d figured this particular trick out when we were both twelve.  The feeling of someone else’s paw around the base of your dick made both of us cum so much harder.  It was a little gay, but felt so good we never felt the need to bring that up.  I reached over, wrapped my fingers around his knot, and gave it a firm grip.  I felt it expand in my hand, and Pete grabbed a wad of tissues from nearby.

“Oh shit, I’m cumming,” Pete moaned.

His cock got super hard and start jumping in my paw, and then he was soaking those tissues with his jizz.  I had to admit, it was really cool feeling him cum.  The sensation of his dick throbbing against my pawpads was like nothing else, and I’m glad we did it together.

“Aww yeah I really needed that.  You close yet?” Pete said, with obvious satisfaction.

“I’m getting there, but it might take awhile,” I said.  I wasn’t quite as pent up as he was.

“Here let me skip the video ahead, the next part is even hotter,” Pete said, grabbing the mouse and clicking a few minutes forward.  

The same two canines were on screen, but now it looked like they were about to fuck.  The poodle girl was lying down on her back, spreading her canine pussy open and giving a perfect view of the pink inside.  The husky’s cock was still in its sheath, with just a bit of his tip peeking out.  He moved over to the girl, and began brushing it against her lips.

“Uhh what is he doing?” I asked, not really understanding what was happening on screen.

“Just watch dude, you’re going to love it” Pete replied.

The man pushed forward, buried himself inside the woman and gave her some quick, short thrusts.  I didn’t really see what was so great about this, until I realized what wasn’t visible.

“Did he just…?  Is his knot inside of her!?”

“Yeah dude I told you it was hot.  Can you imagine it, feeling that hot pussy tie around you?” Pete said.  

Without even asking he reached a hand down and started squeezing the base of my cock.  The action on screen was starting to speed up and now I could see the girl’s pussy bulging a little every time the husky pulled back.  I was unbelievably turned on.  I knew what my knot was for, and what a tie was, but seeing it for real was a totally different experience.  It didn’t take long before I was imagining Cody in place of that girl, and what it would feel like to really mate with him.

“Oh god I’m gonna squirt”

My orgasm seemed to come out of nowhere.  Pete clamped down tight on my knot and I lost it.  The pleasure welled up all at the same time and I felt myself start shooting.  My toes curled, my balls pulled up tight, and I was spraying all over my fur.  I came hard; much harder than I normally did when jerking off.  Pete gripped harder and I felt myself thrusting up a bit into his hand with every throb.

The feelings eventually died down, and the dalmation boy let go of my penis.  I looked down to survey the damage, and it was pretty bad.  I had pretty well soaked my stomach fur in cum, and even managed to get a few stray spurts up near my neck.

“Dude why didn’t you grab some tissues, you looked wrecked,” Peter said, helpful as always.

“I didn’t realize I was going to cum that quickly.  You weren’t kidding, that was so hot.  Fuck I want to tie with someone so bad, that has to be the best feeling ever.”

Pete left for a second and came back with some paper towels.

“Here you go, this is the best I can do.  I should have known, you always make a mess,” He said, handing the sheets over.

“No I don’t!  Ok well, not always,” I said.

“Whatever you say.  And good luck finding someone to knot, there aren’t any canine girls in our grade,”  Pete replied.

“Ugh don’t remind me, I’m never going to get a girlfriend,” I said, leaving out what I had been doing with a particular boy.

“Well at least we can do this together, it’s probably still more than most of the other guys are getting,” Pete said.

“Yeah it's always more fun doing it together, but once a week just isn’t enough,” I said.

“Well you have a younger brother…” Pete said.

I didn’t like where this was going.  I wanted to keep what me and Cody did together a secret, for many reasons, and this was treading into dangerous territory.

“Yeah, what’s that got to do with anything?” I replied warily. 

“You could teach him how to jerk off, and then you guys could do it together,” Pete said.

“Dude he’s only eleven years old,” I said, trying to sound appropriately scandalized.

“So what?  When did you start jerking it?” Pete said.

“Well eleven… but wait, you were the one that showed me how to do it!” I shot back.

“Yeah?  And?  Nothing bad happened.  Besides, who do you think showed me?” Pete said.

“Wait, do you mean Joe…?” I asked, finally putting the pieces together.

“Yeah, he taught me all about jerking off,” Pete said.

“Wasn’t that sorta weird?” I replied.

“No, it was fun.  We still do stuff together sometimes.”

“Stuff?” I asked, not missing that little detail.

“Yeah.  Stuff.  Whatever, it’s not a big deal.  I don’t have a girlfriend either, so it helps take the edge off,” Pete replied, a little defensively. 

I cleaned up a bit, processing this new information.  He had a point.  We jerked off together and it was no big deal, so it was fine that he did it with his brother too.  But what I did with Cody went far beyond that.  Was that wrong?  I wasn’t going to criticize Pete, but talking about that stuff out loud made start asking some uncomfortable questions.

“I guess that’s true.  I dunno I gotta think about it,” I said, not wanting to talk about incest anymore.

We said our goodbyes and I headed home, but was pretty distracted for the rest of the day.  I couldn’t stop thinking about how taboo our relationship was to the rest of the world.  I couldn’t bring myself to talk about it with my best friend; even though Pete was hinting strongly that he had a similar arrangement with his brother.  I was ashamed and started to think there might be a good reason for that.

What if Cody didn’t really want to do stuff with me?  I usually had to bug him to get things started, and he always complained I was being annoying.  What if he didn’t want to say anything because he was afraid of his secret getting out.  Cody hated that wasn’t like other boys, and would do anything to keep that private.  Now I felt like dirt.  I was forcing myself on a boy who was a little different.

I felt horrible.  I was the lowest of the low.  I was a monster who was using my own brother just to get off.  I had to talk to him about this, and try to make it right.  I couldn’t change the past, but I needed to apologize.  

I was too upset to even say anything to Cody that first day.  And for a couple of days after that, too.  Everytime I tried to start the words just died in my mouth.  It was nearly a week later when finally enough was enough, and Cody confronted me.

“What is with you lately?” he asked from his side of our room, sounding annoyed and frustrated.

It was late, and we were both supposed to be asleep.

“I, uhh, I don’t know what you mean,” I said, unconvincingly.

“It’s like you’re trying to avoid me.  You’ve barely said two words to me, and won’t even look in my direction anymore.  And weirdest of all, you haven’t been bugging me for sex.  What the hell is going on?”

“It’s… nothing alright,” I said.

“Is it me?  Do I smell bad or something?  I take showers!  You know, most of the time,” he asked, sounding a little upset.

Crap.  Now I was starting to hurt him just by doing nothing.

“No, it’s not you ok, it’s just…” I said.  The guilt had been building up and I could feel it about to spill out.

“Cody do you hate me?” I finally just blurted out.

“What? Hate you? Kyle, what are you talking about?” he asked, genuinely confused.

“Because I have sex with you.  I’m sorry, alright!  You’re my brother and I’m supposed to protect you and I just took advantage of everything.  You’re just a kid and I shouldn’t have done that.  I won’t use you like that anymore, ok?” I managed to say, the words just kind of tumbling out as I spoke.

Cody was quiet for a few moments after that.  When he eventually did speak it was quiet and thoughtful.

“I don’t hate you, and I don’t hate having sex with you”

“You...you don’t?” I asked.

“No.  I like having sex with you.  Actually, I really like having sex with you,” he said, cracking a smile with that last sentence.

“But… I’m your brother, and I’m older,” I said.

“So what?  I still like doing it!” he shot back.

“I just… I don’t think we should do that stuff anymore,” I said, finally dropping the bomb.

Cody didn’t say anything for a little while; he just looked at me.  I think he was trying to tell if this was a joke or not.  After a few minutes of this impromptu staring contest he sighed and spoke again.

“Well crap you’re not kidding… Fine! I guess I have to get all serious,” he said.

Cody kicked his covers off, and sat up in his bed. He took a few breaths; composing himself before he continued speaking.

“I always knew I was different from other boys, but it didn’t really matter.  I could do anything they could except pee standing up, and I figured out how to do that anyway.  But all that changed when I learned about sex.  It seemed like there was this awesome thing that I was never gonna get to try.  I couldn’t do it with a girl, and I never wanted another boy to know about my secret.  But then we started doing stuff together and I realized that was perfect.  You already knew about my condition and I already lo… liked you a lot.  The first time we had sex for real it was like all that bad stuff just went away.  So yeah I like having sex with you, because I like you.  I trust you, and when we do it I get to forget that I'm different and just feel good.”

It was strange hearing Cody talk like that.  There was none of his usual sarcasm, he just sounded so open and vulnerable.

“I didn’t know it meant that much; I just always thought you tolerated doing stuff together.  What we do isn’t exactly normal, though.  I don’t think any other fifth graders are fucking their brothers,” I said.

“Yeah well, sucks to be them.  If you really care about my feelings, then you should listen to me,” Cody shot back.

I sighed and said, “I guess you’re right.  I’m sorry about this; guess I just got kinda freaked out about everything.”

“So we can keep having sex?” Cody asked hopefully.

“Yeah...”

“Good, then get your shorts off I’m coming over,” Cody he replied.

“What? Now?  Are you crazy…” I tried to say.

It was too late.  I heard the quiet thump of his feet, and before I could finish that sentence there was a puppy pulling the covers off my bed.  I clicked my bedside reading light on just in time to see the naked boy grab onto my boxers.

“We haven’t fucked in a week, and I feel like I’m going to explode.  I don’t want to wait for you to have another panic attack, so let’s just do it now,” Cody said, pawing at my clothes.

I didn’t put up much of a fight.  I was pretty pent up by this point too, and even if this was kind of a bad idea I really wanted to do it.  It only took a few seconds before I was stripped naked, and had an equally nude little brother crawling on top of me.  His hands shot out and latched onto my sheath, eager to get things started for real.  I grabbed on and held them still, there was something else on my mind that I needed to get out.

“Cody wait…” I started.

“Oh come on Kyle!  I told you already: I want to do this,” Cody said, clearly annoyed.

“I know, I know.  I do too, but there is something I thought we could try,” I replied.

“Oh really.  Ok what is it?” Cody said eagerly, sitting back on his haunches.

“I kinda wanted to tie with you.  You know, put my knot inside when we do it?” I said, not sure how he would respond.

“Oh... umm ok,” Cody answered flatly.

I was worried by this sudden drop in enthusiasm, and didn’t want to pressure him into anything he was ready for.

“But we don’t have to or anything, if you don’t want to.”

“It’s just… won’t it, you know, hurt when you shove the knot inside?  It gets so big when you’re hard,” Cody said.

“You’ve been reading those sex stories again, haven’t you?” I asked, already knowing the answer.

“What!? Nooo...” he shot back.

I just gave him a disbelieving look.

“Ok fine, yes,” he answered, a little annoyed at getting caught.

“You know those things are all written by humans; they have no idea how canines work.  I’m not going to jam the knot in when its already big.  I put it in before I get hard, then it gets big inside you, and we get tied together,” I said, trying to correct his misunderstanding.

“Ohhhhhhhh.  That’s why you didn’t want me rubbing your sheath,” Cody said.

“Yeah, exactly.  So did you want to try it?” I asked.

“Ok! What do we do first?” Cody answered with newfound interest.

“I guess just lie down on the bed.  We can figure stuff out from there.”

“Are you sure?  We never do it on the bed; it makes noise,” Cody asked.

“Yeah I know, but we might be stuck together for a long time.  The floor is really uncomfortable, so we just have to try extra hard to be quiet,” I replied.

Cody was satisfied with that answer and flopped down backwards onto my mattress.  He spread his legs out wide like usual, but I wasn’t sure that was going to work this time.  I moved into place between his thighs, but couldn’t quite get our parts to line up.  There was only about an inch of dick sticking out of my sheath, and the angle was a little bit different than before.

“Hold on, put your legs up in the air and try resting them on my shoulders.  I think that will be easier.”

He listened, and put his ankles up next to my head.  That gave me a better angle, and I could just get the pink tip of my cock up against his spade.  I put my hands on his thighs and asked the fateful question.

“Ready?”

“Please,” Cody begged.

I didn’t need any more encouragement, and pushed myself inside his pussy.  Even that felt different than usual.  I could feel his puffy lips peeling back my sheath.  It felt even better when I slipped all the way in him.  This was the deepest I’d ever been inside my little brother.  I was probably no more than an inch further, but even that little bit felt amazing.  It took every ounce of willpower not to just start thrusting.  My knot started to expand right away, and the feel of it pushing out against the soft walls of his vagina was mind blowing.

Cody gasped and said, “Oh wow I can feel you getting hard inside me.  This is… oh you’re filling me up.”

I was a little worried; if my knot was too big for him there was nothing we could do.  Pulling out would just hurt even more, and I wouldn’t go soft until I finished.  Cody, however, looked like he was enjoying every second.  He even started moaning softly when I became fully erect.  I could feel myself throbbing inside him, and decided to test the tie a little.  I pulled back, just a bit, and Cody’s eyes shot wide open, and his hands grabbed onto mine.

“Oh fuuuuuu…” was all he managed to say before his eyes squeezed shut and his pussy started spasm around me.

He was cumming.  With just a single tug I’d sent him over the edge.  It only lasted a few seconds, so it wasn’t a very strong orgasm, but this had never happened before.  

“Did you just...?”

“...yeah.”

“But how…”

“I dunno just keep going; this feels so good,” Cody said.

That sounded perfectly reasonable to me.  I started to thrust, gently at first, trying not to overwhelm him right after a climax.  That didn’t last long, though.  I was just as pent up as my little brother, and the heat of his pussy was too good to resist.  Soon enough I was really pushing inside him; leaning further and further forward with every move.  It was a good thing Cody was flexible, because with his legs on my shoulders I was practically folding him in half.  He showed no signs of discomfort though; humping back into my every thrust just as hard.

I let go of his legs and planted both hands beside his head; getting just a little more leverage, and putting the boy’s knees next to his head in the process.  Now we were fucking for real.  Cody let out another gasp, and I felt him cum around my cock.  This had never happened before.  It usually him longer to climax than me, but he’d gone over the edge twice already.  I didn’t slow down this time, and kept thrusting through his orgasm.  

Cody started moaning.  At first it was a soft, sexy little whine that I could only hear because we were face to face.  It actually spurred me to to fuck just a bit harder; I really got off from making him feel good.  But it didn’t take long before he started to get louder.  A lot louder.  His voice became a keening wail that sounded desperate and joyous at the same time.  If anyone happened to walk down the hall there would be no mistaking what was going on inside our room.

“Cody you gotta keep quiet!”

He didn’t respond.

“Cody! Stop! We’re gonna get caught!”

Still nothing.

I was starting to panic.  He was totally lost to the outside world, and if I didn’t do something it was going to be a disaster.  Now, the obvious answer would have been to stop thrusting.  But that wasn’t something I was capable of doing at the time.  I was just as caught up in the moment as my brother and couldn’t keep my hips from moving.  The other options were pretty limited.  My arms were busy holding me up, and couldn’t exactly use my feet.  There was only one thing left to try.

I kissed him, right on the lips.  Cody’s arms shot up and his paws wrapped around the back of my head.  I opened my mouth, and fell into our shared embrace.  Our tongues met and I never wanted to be apart from him.  There were no more excuses or rationalizations; I wanted to kiss Cody because I loved him.  He was a boy, and my brother, and none of that mattered because we belonged together.

I continued to thrust into him; determined to feel his body against mine like never before.  I could feel the tension building, and knew he was getting close again, but I wasn’t going to last much longer either.  My knot was being squeezed from every angle and it felt like electricity was running up my spine.  Cody froze and moaned even harder into my mouth; he was cumming again.  He started convulsing hard around my cock, like his spade was trying to draw the cum out all on its own.

That was all I could take.  My knot swelled up so large it almost hurt and orgasm swept over me like a tidal wave.  I came harder than ever before.  I could feel every single shot pumping out and flooding my little brother’s pussy with sperm.  The pleasure was overwhelming; my arms were hugging Cody so hard they ached, and my hips locked in place trying to squirt into him as deeply as possible.  We kept kissing the whole time; groaning and grinding against each other in a desperate attempt to become even closer.

Finally, mercifully, our shared orgasm died down.  I don’t think either of us could have taken much more.  Every ounce of strength in my body was drained, and it was all I could to flop down beside Cody instead of collapsing on top of him.  I broke our kiss and tried to calm down, but my body had other ideas.  

Just when I thought everything was done I felt pleasure well up again, and my penis gave another small squirt into Cody.  Then a few seconds later it happened again.  I was still cumming.  I realized that as long as we were tied I was going to keep filling Cody with my seed.  I was so distracted by this new revelation that it took a minute until I noticed the soft sniffling beside me.

“Cody?  Are you crying?  Did I hurt you?” I asked, becoming panicked by the possibility.

“No… *sniff* It’s not… *sniff* that.  I dunno… everything just feels so good I can’t control it.”

My heart felt like it was released from a vice.  Just the thought that I had harmed him was a nightmare come true.  I wrapped my arms around him in a loose hug and rested my chin on the top of his head.  Cody snuggled into my chest, and we just held each other as I continued to throb and squirt inside him.

“Kyle… I love you,” Cody said.

I didn’t hesitate at all and answered, “I love you too, Dakota.”

I reached down and grabbed the covers, pulling them on top of us.  We fell asleep like that; tied together in my bed and cuddled up under the sheets.  It was a stupid, risky thing to do.  If anyone had come to check on us we would have been busted.  But that didn’t happen.  We were just two young boys in love, and it was one of those rare perfect moments in life.

A long time later I would do the math, counting back forty weeks, and discover that was the night I got Cody pregnant.