I just read this story online that's pretty hot.  

GAY FICTION 

I always liked the risk of being caught jacking off, and then having someone join in, but I had never really gotten the courage to do it.

So one day, my little cousin Matt and I were the only people at home. I was xx, he was x. I started jacking off in his brother's room with the door open. After about 2 minutes, he walked in and saw me there, naked on his brother's bed, stroking my 7-inch dick. He immediately turned and ran out of the room.

I followed him to his room, still naked, and told him to take off his clothes too. He told me to go away. I told him it was okay, just do what I say.

He said no. So I went over and threw him on the bed. I pulled down his pants and spit on his tiny tight hole. He kept yelling "NO," but I just covered his mouth. Then I slid my dick inside, which caused him to scream even more. It was so tight, and he started to bleed a little, but I just kept sliding my dick in and out, using only my spit and his blood as lube. It felt so good, his tight ass squeezing my dick. I said, "scream all you want, no one will hear you." He just started crying quietly.

I felt my cock start to throb.

I was going to cum soon, so I took it out of his ass and watched the spit and blood drip out of his now gaping hole. My dick had blood on it and some specs of brown at the tip. I turned him over and took my hand off his mouth. When he opened his mouth to scream i shoved my dick down his throat. He gagged as I started to shoot into his throat. When I took it out I let him go.

He ran straight to the bathroom, just as I had intended. I followed him in there and then picked him up and put him in the tub.

My dick was still hard. I turned him on his stomach again and slid my dick into his ass. It wasn't as tight as the first time anymore, after what I had just done to it, but it was still pretty tight.

I had planned for him to go into the bathroom for a reason. I needed to take a piss. As I fucked his ass, I released. He started screaming again as the piss squirted out of his ass around my dick. I pulled out off his ass and went over to his mouth. After I had filled his mouth with piss I put my hand over it. "Now swallow" I said. He did as he was instructed, probably just because it was the only way to get the piss out of his mouth. "Good boy," I said.

Then I went back to his ass. As I fucked him, I grabbed his little 2-inch dick and began stroking it. It was already hard. I could feel my cock start to throb again, and as it did, so did his. I thrust mine all the way into his ass, all the way up until my huge xx-year-old balls knocked against his tiny x-year-old balls, and I shot my load deep into his ass. As I did, he had a dry orgasm.

After that, I got up and left him there, crying in the bathtub. I heard the shower come on from my room. When he got out of the shower and walked past my room back to his room, I told him that if he "ever tells anyone, I’ll do it again, and next time it will be much worse"

The next day, Matt told his older brother Vincent, who was the same age as me. Unfortunately for Matt, Vincent was the wrong person to tell. That night, Vincent and I planned to get him while he was sleeping.

We snuck into his room. I picked him up and carried him out. His parents were home, so we couldn’t do it here. We carried him into the forest right behind the house. When he felt the cold air hit his skin, he woke up. We were ready for this. Vincent gagged him right before he could try to scream, and then tied his hands together.

We carried him until he was out of earshot of the house, and then started to take off our clothes. He sat on the ground, looking up at us with fear. Vincent put a blanket on the ground, and then lay down on it. I started to lick Matt’s little asshole to get it wet.

Then I started sucking Vincent’s dick, which was huge, at least 10 inches long and very thick. I picked up Matt and made him sit on Vincent’s lap. Vincent’s dick slid slowly into Matt’s little tiny ass. Vincent pushed him down harder so that his dick went all the way in. Then I came around the back and started to slide my 7-inch dick into Matt’s already filled hole. Feeling both of our dicks stretching Matt’s tiny hole at the same time, and rubbing up against eachother, was the best feeling in the world. Matt’s hole started to bleed again from being stretched too far.

He tried to scream through his gag, but couldn’t. Vincent and I started fucking him faster, deeper, harder, until we both came. I could feel our cum mixing, providing extra lube inside Matt’s ass. I picked him up and pulled him off of our dicks, and then leaned in and started sucking Vincent again, as Matt lay on the ground next to us, crying. After he shot another load into my mouth, I got up and started kissing him.

Vincent and I both got up and pissed on Matt one last time. Matt just laid there, the piss running down his hair and his face and his chest.

Before we took him back to the house, I said to him "I told you not to tell anyone. Next time, if you tell there will be three of us." He never told anyone after that. Me and Vincent continued having sex whenever we got the chance.