How I learned about sex

This all started when I was 13 years old and my brothers Nick 12 years and Gar 10, also my sister Sam 11. We were broughtup in rural area in Ohio. We Always heard the older boys talk about but fucking dick sucking and fucking your sister. My brother Nick and started playing with each others dicks when we would come home from school. Who ever got home first between my self and my brothers the one would tell our parents that they were tired and was going to take a nap. If it was my brother nick he would go upstairs and lay down in his bed with his pants off on his back with a hard on, for being 12 he had a big cock. If I was the next to get home my parents would go out for the evening, they felt I was old enough to take care of my brothers and sister what they did not know they took care of me. I would go upstairs to my brothers bed room and take my clothes off and get in bed next to him, Nick and Gar shared the same room I would would slide across him and rub our dicks togeather then I would slide off and lay next to him and pretend that I was a sleep Nick would reach over and start pumping my dick up and it felt so good, then he would start sucking on it make me come and I would be jacking him off while he sucked me I could never bring myself to suck him I think it was because of his size.