Brother on Brother

I have three younger brothers, and I reached a point in my life where I began to fantasize about having sex with them. I usually go for girls, but I have never had much success with them and am often left in need of a warm hole to blow my load in. Since my brothers and I are always in the house together, I figured that we might as well use each other to get off. I first lusted after my 16 year old brother, and we hooked up a few times at night since our rooms our both on the third floor and our school vacations sometimes leave us home alone together. After that, I began to want to shove my fat cock into my brother John. I have caught John masturbating from a very young age on several occasions, which is what really began to turn me on to him. He is now 15 years old, has short black hair, brown eyes, is very thin, but has a nice round ass which is just begging to get fucked. I did manage to hold him and grind my erect penis on his ass on several occasions, but he never let me get any farther than that. He would not let me penetrate him, and I was left to go jerk it in the other room. However, that all changed on one family vacation.
My family was staying in a hotel, and we had two connected rooms, one with two beds and the other with one bed. The first night we were there, my brother John and I were assigned to sleep alone together in the room with just one bed. I waited until John was asleep, pulled down his pants past his ass, and began to hump him. He must have known that I would try to fuck him that night because his asshole felt like it had been played with earlier in the day. As he started to wake up I started placing my bulging cock head into his anus. My entire body was covering his; he knew that he helpless against me. For the first time, I entered him. We both moaned, as my penis plugged his young hole. After a few struggles he just moaned softly as I continued to push into his ass faster and harder. With pre-cum oozing out of my cock, I pulled out of him and rubbed the salty liquid all over his but cheeks. I then re-entered him, and pressed his abdomen down against the mattress. His body was so warm from being under the covers and his young, virgin ass was so tight that the feeling was indescribable. I lifted up one of his legs so that I penetrate deeper. Very soon after I did this I thrusted forward and came, depositing a nice, warm pool of cum in his ass.
The next morning I woke up next him and had an incredible lust for his sweet little ass. Needless to say I had some morning wood, and it only got harder as I thought of how I had fucked his virgin ass the night before. I just had to do him again before my family left for another day of vacation activities. However, I noticed that the door between my family’s two rooms was now open, so fucking him in the bed was not an option. I woke John up and guided him into the bathroom while he was still a little groggy. I quietly shut the door and reached for his pants with one hand as I rubbed my dick with the other.