When my mom got married for the third time, her new husband brought his son Ryan with him. At that time, I was already 16 years old, and my new "brother" was three years younger than me. But what an impression that boy made on me, with his abundant hair and well-developed muscles, with his beautiful face and his arrogant air.

At that time, I had already managed to get several girls from school to go out with me. I think I was sure of my sexuality, although at that moment I had just broken up with my girlfriend Victoria about a month ago. We had broken up on good terms, I suppose, since her reputation as a slut made her get with another guy just a week after we broke up, and it was just as easy for me to get her into bed.

As things were, I had to resign myself to not fucking, but rather to jerking off while watching porn or occasionally with some girl just to have a good time. That day, I was with a classmate named Rebeca.

"Now you can take out your cock and jerk off because we don't have condoms, and besides, you didn't turn me on enough..."

I didn't hesitate to free my dick and start jerking off like a monkey, while I put my mouth back on her pussy and kissed it with passionate devotion, and in almost two or three minutes, I came with tremors and gasps that made Rebeca laugh and comment on my ability to jerk off.

Just then, Ryan arrived at our house with his dad, and when Rebeca heard them arrive, she quickly got dressed and said goodbye to me before casting a lustful glance at my little brother, who seemed not to care.

As the days passed, Rebeca's insistence on Ryan's beauty and manliness was such that I ended up convincing myself of the boy's enormous superiority, and I started to behave with him with a certain servility and observe him with attention, first discreetly and soon with total shamelessness, and in a way, I started to feel attracted to him.

He seemed not to notice or care about the way I was observing him. In the afternoons, after coming home from school, he would get rid of his uniform and walk around the house in his boxers, exhibiting before my attentive eyes the enormous bulge in his crotch. Until one occasion, my curiosity became so apparent that Ryan had the opportunity to mock me for it.

That time, the bathroom in his room had broken down, so he had to take a shower in my own bathroom. When he finished, he came out completely naked, drying his head with a towel and swinging his enormous cock, which hung dormant between his legs.

Damn! What a huge cock my little brother had! Even in complete rest, it wouldn't be less than 17 centimeters. What enormity! No wonder my stepfather said he had inherited his manliness! And to know that my cock, even in its most glorious erection, wouldn't reach 15 centimeters!

"You seem to like cocks..." Ryan said with sarcasm. "...no need to look at me like that, with your eyes bulging out..."

I tried...