Best Friend Became More...

Growing up my best friend was Jamie, a girl who lived next door. She was always a tomboy and mainly hung out with me and my friends. She kept short hair, was really fit with small tits. She acted like one of the boys, playing sports and rough housing with us.
When I was 17 and she was 16 something happened. One day we started wrestling around and I kissed her. We had sex. It was so hot. I was surprised I knew Jamie was fit but she had a great body. Her little pussy was shaved completely bald and it was so pretty! About a week later we were all at a friends house hanging out and playing video games. Jamie and 4 of us boys. One of the guys (David) walked over to Jamie and whispered something in her ear. She got up and walked upstairs with him. I couldn't believe it. She went up to a bedroom and had sex! I was so jealous! But while they were gone another boy said something and I realized he had also had sex with Jamie. The light bulb went on. We all had had sex with Jamie and just didn't know. When they returned we were all kind of silent.
The next day I talked to Jamie and she admitted she had been having sex with the other boys and I was just the most recent. Well a few days later we were all hanging out in the basement again. This time I got the nerve and made the first move. I asked Jamie to go upstairs. Then she really surprised me. She looked around and said "why go upstairs, we all know". Jamie started taking he clothes off and I realized she expected to have sex, right there in the room, in front of everyone. I froze until Davis spoke up and said he would. I undressed and we had sex right there on the floor. When I finished David was already naked and immediately got between James legs. I watched as all 3 of the other guys fucked Jamie.
That day became the norm. Not just us 4 guys but a few more joined the group. We pulled trains and gangbanged Jamie constantly. I have memories of Jamie hanging around all day naked and getting used. Covered in cum and her pussy looking like a super glazed donut!!!
Me and Jamie actually started dating during that time. The guys thought I was crazy sharing her like I did. We ended up getting married later on...