It was summer of 1980. Me and my best friend were 15 and both our sisters who were also best friends were both 14. All 4 of us were friends our whole lives. They lived a few houses down our street and they had a pool. We would spend every day of the summer up at there house swimming. One day the four of us were swimming and our sisters were very sexy and they knew it. We were playing truth or dare and that led to us talking about hooking up. We dared our sisters to make out with eachother which they did and then we made out with each others sisters in the pool. We got out of the pool and we sat at the table and kept making out. It got really hot and we had our sisters get on their knees and suck me and my friend while we sat next to eachother outside during the day. It was hot getting head from my boys little sister but i did not like watching my little sister give head. My boy got soft and didnt even finish but i came in his sisters mouth. I felt sorry for him because my sister was way hotter than his. His sister was pretty but she was skinny and flat chested. My sister was hot with nice big tits and ass. We chill the rest of the day and night and it was cool. Me and my sister walked home and I was pissed that i saw her sucking dick. We get home and its late. She ends up coming in my room in a big tshirt only and starts talking dirty. She told me she liked my dick and that she wished she had it instead earlier. I told her she has it now and I guided her head to my dong. We didnt have sex but she gave me an amazing blowjob and i tittyfucked her and blew on her tits.