When I was 15, I had a younger cousin who was 12/13. I hung out with him and his brothers a lot and we would wrestle sometimes. With this cousin however, our wrestle matches would get a bit sexual, we would casually sneak in a grind or a hump. We both brushed it off. One night we were up playing Fortnite. I was thinking about doing stuff with him, so I asked if he wanted to get in the beach house hot tub. He said yeah, so we did. At first we were sitting across from each other, just talking, but then things got quiet. The tension was rising. I decided to get out for a second and ‘adjust the temperature.’ When I got back in… I sat closer. I played in off casual, and talked with him again, but I would occasionally brush my foot or leg against his. Then the tension built up again, this time though, I was right next to him. He laid back and closed his eyes for a moment, and the one dim light above illuminated his wet young boy body. I was in a trance. I wanted to touch that boy, and deep down I knew he wanted me too. I kept brushing him with my foot until our legs were overlapped. The silence went on for what felt like hours, until we shifted into each other and rubbed our bodies on each other in a horny frenzy. He didn’t wanna kiss (as to not be gay, of course) but I slid some body kisses in. We grinded each other with our young soaked bodies and it was heaven. After a bit I wanted more. I wanted to see his cute ass. And I wanted him to see his big cousin’s dick. I egged him inside and we went into our bedroom bathroom. We took off our clothes. His little penis and ass only made me hornier, and he was in awe of his big cousin’s cock. He bent over and I grinded on his ass all over the bathroom until we ended up on the floor. I grinded and grinded that horny boy’s soft butt and whispered dirty things in his cute ears until I squirted my cum all over his back, as cousins do. I cleaned it up and we went to bed. Best night ever.