Filling My Brother Ch. 1

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#1 of Filling My Brother

A late night tryst between two young brothers. They have been fooling around with each other for awhile, but tonight might just mark the start of a real change in their relationship.

Another new story, and one that's quite a bit different from what I've posted before. Special thanks to IB: Thaddeus and IB: Birdpup for helping me come up with a name for this story.

One quick thing I feel the need to mention: I really hate the word cuntboy. I'm tagging the story that way because its the well known term for "boy with girl parts" but its not going to appear in the actual story.


Chapter 1

"Psst hey are you awake?"

No answer.

"Cody are you up?"

I heard a bit of movement on the other side of the room, followed an annoyed whisper.

"Whaaaaaaat I'm trying to sleep"

"I can't get to sleep. Can we, you know... do the thing?" I asked as quietly as I could.

"What? Mom and Dad are both home, are you crazy? Just do it yourself"

I picked my next words carefully. I knew Cody wasn't really mad, but we still had to play this game so it felt like he was in charge.

"So we'll be quiet. You know it's more fun together. And I'll let you play with it as much as you want." That wasn't really a sacrifice on my part, but I knew it's what he really liked.

"Hmm it's late, why can't you just wait until tomorrow," Cody whispered back.

That wasn't a rejection and we both knew it.

"It's Friday, you can sleep in tomorrow. Besides it's easier if everyone else is in bed."

There were a few long seconds of silence with no response. Then, even quieter than before, Cody asked, "...can I play with it tomorrow too?"

I held back a chuckle, trying not to ruin things. I really did know what he liked.

"If you want to, I guess that's okay," I said softly. It was more than okay but I needed it to sound like a concession.

There was another few moments of hesitation until Cody eventually responded with, "Fine I guess we can do it. God I hope I'm not this annoying when I'm a teenager."

I heard his mattress creak and then sound of paws trying to move quietly in the dark. I was already prepared, and spread my comforter and pillow out on the floor next to my bed before he'd crossed the room. The sound of squeaking bed springs was a dead giveaway, and we couldn't chance getting caught.

I carefully angled the small reading light I kept next to my bed and turned it on. I knew from experience that it wouldn't be visible under the bedroom door. The light instantly turned the shapeless form before me into the adorable eleven year old German Shepherd cub I was expecting.

I couldn't help but grin. My tail started wagging on it's own when I saw him. He really was cute, even if I'd never say that to his face. He'd hate it if I did anyway. He was fidgeting a bit, which only made him cuter.

"Well?" He finally spoke. "You woke me up, are we going to do anything or what?"

I was pulled out of my reverie for a second and answered, "Uhh sure did you want to lie down or should I?"

The indecision on his face was quickly replaced with defiance. "Oh no you don't. You promised I could play with you. You don't get to change our deal just because you're older."

I couldn't argue with that. Also I didn't want to. He could do whatever he wanted for now. "Well if you're in charge then what are you waiting for? I'm not going to stop you."

With that I felt a pair of hands reach around and unhook the tail hole on my boxers. I was still sitting, so Cody kneeled down in front of me and I felt him start to pull the shorts off my legs. I lifted up from the bed to help, not wanting to waste any time. As soon as I felt fabric pool around my feet those two little hands shot back up and started rubbing my sheath.

I loved this part, even if it didn't feel nearly as good as the other stuff. Knowing someone was absolutely fascinated by my dick was huge ego boost to a self conscious fourteen year old. I leaned back a bit onto the bed as he began to gently massage my balls. His touch was precise and knew exactly how to get what he wanted.

I was worked up before we even started, so it didn't take long before my penis started to peek out from its sheath. I knew this was Cody's favorite part, because his eyes were glued to my shaft everytime we did this. He moved his face in even closer to my crotch and pulled my dick up vertically to watch the sheath slide down. His hand began to stroke up and down, and I could feel myself getting harder by the second. Soon enough Cody had pulled my sheath down all the way so my knot was fully exposed. That got me really hot and small jets of precum started squirting out of my tip.

Cody had a little surprise in store and leaned forward, taking me into his mouth. I felt his tongue sweeping across my sensitive tip, obviously trying to get a taste directly from the source. This wasn't new, but I usually had to beg a little before he agreed to suck me. Tonight, though, he felt like a pup on a mission.

He was sucking me deeper than ever before. I felt his hand moving up and down my shaft in time with his mouth, and going down a little further each time. He nearly got to the top of my knot before I felt my dick touch the back of his throat and Cody gagged for a second. I gently placed my hands on the sides of his head and lifted his face away from my crotch.

"Whoa slow down there buddy, I don't want you to hurt yourself. Besides it's probably time to start the main event."

Cody looked disappointed. "But you said I could play with it as much as I wanted."

"I know, but you're too good at this. If we don't do it now I'm not going to make it. You can still play with it tomorrow."

Cody smiled and sat back on his haunches. I reached out and stood him up, facing me. He was only wearing a pair of boxers, same as I had been. Reaching behind him I unhooked the tail hole, and then slowly pulled the shorts off his skinny hips.

I loved this part, but Cody was always embarrassed to be seen naked. You see he was a little different than most. He was born a boy, but was technically intersex. That could mean a lot of things, but in his case it meant having girl parts instead of boy parts. The rest of him was totally male, but he was very self conscious and kept it secret from everyone outside the family.

As his boxers slid down to his knees Cody tensed up even more. I loved the look of his pussy, even if he hated it. His parts were canine and the lips stuck out from his body, forming a little "V" in the front. They looked puffy and I could just make out the slight scent of arousal.

When his underwear hit the floor I moved my hands to his pussy, rubbing the soft spade. After a few seconds I squeezed a finger between his lips, sinking into his slick tunnel. I pushed in and out a few times and could feel he was already very wet, and clearly turned on. A soft gasp escaped his lips as I pulled out, and he looked at me with a hungry expression across his face.

"Lie down"

Cody responded instantly, his little dominant streak quickly forgotten. He laid down on his back and spread his legs out as far as they would go. We'd done this enough times to know what worked best. I followed right after; kneeling down in front of him. Taking hold of my dick I leaned forward and pressed it against his pussy. I brushed the tip of my cock through his folds, which caught me easily. They always seemed to line us up perfectly. Taking a breath to steady myself I looked Cody in the face and simply asked, "Ready?" He was too worked up to speak and could only nod his head vigorously.

I grabbed onto his hips, pushed forward, and slipped into heaven. No matter how many times we did this it never stopped being amazing. He was so tight and slick inside it was like sliding against silk. And the heat. Oh god he was so hot inside. It felt like I was being invited to thrust into him as far as possible. I kept going until I felt my knot come to rest against his squishy outer lips. Looking down at Cody I searched for any sign of discomfort, but he had his eyes closed and a look of total bliss across his face.

"I'm going to start moving, ok?"

The only response I got back was quiet "Mmmmm"

I pulled back about an inch and pushed all the way back in, moving out a little further with every thrust until I had built up a steady rhythm. Cody moaned and wrapped his legs around my waist, letting out a little gasp every time I bottomed out inside him. He reached his arms up and grabbed my sides. I knew what that meant so I laid down over top of him, resting my elbows on either side of his head. His arms moved up and locked around the back of my neck, holding on like he was afraid I'd disappear.

Our faces were so close we were almost touching muzzles. I stopped humping and just looked at him, and after a few moments Cody opened his eyes. He gave me a questioning stare for a second; until I started thrusting at full speed again. Then a smile spread across his face in the dim light, and I could hear the little sounds of contentment he made as we fucked.

We continued like that, starting into each other's faces as we tried to have sex as quietly as possible. It was incredibly hot to see the pleasure in his expressions as we humped into each other. The way his eyes got big when I pushed just a little deeper, or how he would tilt his head back in ecstasy when I hit just the right spot.

All too soon I felt my orgasm approaching. I leaned my head down next to his as I reached the final stretch, and whispered in his ear.

"I'm gonna cum"

Cody grabbed me even tighter than before and whined, "Nnnng no I'm so close you have to keep going"

I was determined that he was going to finish. I moved my hands and grabbed onto his shoulders for leverage. I started pistoning into him even harder than before while trying to hold myself back from the edge.

I felt the boy beneath hold me tighter with every thrust, the tension in his body reaching the tipping point. Finally, Cody let out a sudden gasp. I felt the walls of his pussy start squeezing me, like they were trying to milk out every last drop.

And they did. My orgasm hit immediately, and I heard myself growl as I fired jets of sperm into my little brother's pussy. I gave one last hump and pushed into him as far as I could. I ground my knot against the outside of his puffy lips and felt the waves of ecstasy crash into me. The spasms of pleasure seemed like they would never stop. It had to be the most I'd ever cum up to that point, and when I regained my senses I could feel it leaking out a little around my knot.

I pulled my face up from the pillow to look at Cody and I felt something totally new. He leaned forward and kissed me right on the mouth.

We had fucked more times than I could remember. We'd been having sex for about a year by that point, and had been fooling around for another year before that. We had tried every position we could think of. But we'd never kissed. That was something boyfriends did, and neither of us were gay. We were just having fun, and making each other feel good. At least that's what I thought we were doing.

Both his hands were in the back of my head while he held on for what seemed like a full minute. When he finally let go Cody had the goofiest smile I'd ever seen plastered across his muzzle. He threw his arms back over his head and let out a contented sigh.

"That was the best ever. I think that was the hardest cum I've ever had."

The sudden shift back to normal threw me off again and it took a few seconds before I could respond.

"Now are you glad I'm so annoying?"

Cody rolled his eyes but couldn't hide his smile.

"Whatever. I guess it was ok. This time. Now hand me something to clean up."

Shit. I forgot about that. I didn't have anything within reach so I just grabbed Cody's boxers.

"Oh no you don't. Give me yours I'm not getting my clothes all dirty."

"What, why?" I asked.

"Cause if Mom sees your boxers full of cum she is just going to assume you're a gross teenager. And she'll be right. But if my clothes have jizz on them it will be a little harder to explain," Cody said in his most annoying tone of voice.

Right. Stupid.

After a quick search I handed my underwear to Cody and finally pulled myself out of his pussy. A large stream of cum started flowing out right after, and he used my boxers to soak it up.

"It's your fault anyway. If you didn't pump so much of your stuff into me I wouldn't have to stain your underwear. I'm going to be into the bathroom all night waiting for your goop to come out."

I looked him right in the eyes and said, "You love it when I fill you up, don't even pretend."

Cody surprised me one last time that night when he suddenly looked sheepish and quietly said, "Yeah I do. And Kyle... thanks."

Turning away he quickly got up and slipped out the door, headed towards the bathroom.

I put everything back into place on my bed and laid down. I always felt tired after sex, and could feel myself nodding off. One last thought was keeping me awake, though.

"This is going to get complicated."

I had no idea how right I was.