All people in this story are over 18 years of age and no animals were injured in writing this tale.
I was raised on a farm in the Midwest. Our nearest neighbor was a mile away. There were three children in that family, Kay was a girl my age, Kathy was 2 years older and Carl was four years older. We would get together in the summer to play games, ride horses and just together to spend time I was bored one summer day so I walked down to find some company. As I neared their home I was met by Kay. She told me to follow her out to the barn because she wanted to show me something.
We entered the barn and climbed a ladder into the loft. She pointed to a blanket that was on a pile of hay. Now I wasn't the brightest bulb on the Christmas tree but I knew as soon as I looked that Carl was fucking Kathy as hard as he could.
Kay said, "what do you think of that?"
"Looks like fun to me" I replied.
"They do it all the time," she said.
"Do you do it too?" I asked.
"A few times but Carl says she's better at it because she's older. I usually end up being the look out so they don't get caught."
I looked at Carl and Kathy again and it appeared they were both having a great time.
Kay looked at me and asked, "Have ever done it?"
"Nope, never."
"When they finish would you like to do it with me?"
"I'd sure like to try," I said.
At that moment I heard Kathy say, "come in me, Carl." and it appeared Carl was more than happy to oblige.
Carl rolled off Kathy and announced he had better get to the field to help his dad before he came looking for him. He pulled up his pants and disappeared down the ladder.
Kay laid down beside her sister and pulled up her dress. I was a little surprised to see she wasn't wearing panties. She beckoned to me and I stepped closer as I dropped my pants around my ankles. I wasn't sure exactly what I was doing so I laid between her spread legs and poked about in a feeble attempt to imitate what I had just seen Carl doing.
Kathy rolled on her side and said "Raise up." As I did she reached between us and grabbed my dick. She pushed it up and down Kay's wet slit and then told me to push. As My dick slid in, Kathy pulled her hand out of the way. "How's that feel?" she asked her sister.
Kay smiled and said it felt great. "I think he's as big as Carl."
"Maybe bigger," Kathy giggled.
I'd love to say I fucked her for an hour but actually I was finished in about six strokes. It was probably the best feeling in my life up to that moment but it was over all too soon.
Kathy laughed and said, "Don't worry about it. Carl shot his wad before he was even in me the first time. Besides, you'll be hard again in a few minutes."
I was between the girls and they took turns playing with my soft cock and it wasn't very long until I was hard again.