Last month, my brother, who is 15, and I were at home by ourselves for the weekend. I had just come home from school and my brother was already home, in his room. I logged on to the computer and was surprised to find that my brother had just been looking at porn sites only a few minutes ago. So I quietly went up the stairs, cracked his door open, and peeked inside.
I expected to see him masturbating, but when I looked inside, I was surprised to see him naked on the bed, humping a stuffed dog doggy style. He had put a hole in between the legs and was having sex with his stuffed dog! I got pretty turned on by this and opened the door. He was so shocked and embarrassed to see me. He tried to cover his rock hard penis. I told him I'd take my clothes off for him if he kept masturbating. I said that I masturbated too and that it was okay. He agreed and proceeded to keep masturbating with his doggy.
I got naked and started to rub my clit. I asked if I could touch his penis and he said okay. As I started to rub it my brother groaned and shot cum all over me. I was so horny, I told him to suck on my hard nipples, so he did. It was the best orgasm I had ever had.
After it was all over we cleaned up and agreed that we would never tell anyone that this happened. I said that we could do it again, as long as it never went further. Since then we have masturbated together twice, and nothing turns me on like my brother humping his stuffed animal and right before he cums, he starts barking like a dog. It is so cute, and I find that I now also enjoy masturbating with my stuffed animals.