Cousin Jack-off

I was 17 and staying with my aunt and uncle. My cousin was a year younger than me. My cousin and I used to sleep in the same bed. He used to remove his shorts at night under the sheets. One night we were sleeping together and I wasn't able to fall asleep. I had my hand on the sides of my body with my palm facing upward. Suddenly my cousin rolled over. His penis accidentally touched my hand. I felt it and had an instant erection. He had dark black curly pubes and I could feel them. Soon his penis started becoming big. I was too scared to move thinking he would wake up. He started moving his cock up and down in my hand. I slowly grabbed his penis. He continued to do it for sometime in his sleep. Then suddenly I felt sticky fluid on my hand. He had cum. I slowly put my fingers in my mouth and tasted his hot cum.