Girlfriend adventure

I had a girlfriend when I was I7 and she was not yet. She only wanted to fuck, like a maniac. She blew me the first date, and then we fucked the next morning. We did it at her parents house, and she had two friends over. She and I went into her room and I went down on her before fucking her. Great body, tight and hard and amazing tits with a nice size ass. She was actually slightly bigger than me and quite strong. Anyway, the first time we fucked, when we finished, the two friends came in the room and started talking with her as we were getting dressed. they commented on our fucking sounds. A little different but exciting to think they listened to us. We hung out several more times, and each time they must have listened to us fucking and they always were coming in just after we finished. Several weeks later, we were at my house and I showed them a spare room they could use while my girl and I went into my room. We started fucking, and at one point she had forced me down onto the bed and was on top of me grinding down onto me. I was enjoying it when I realized that there was a pair of hands on my legs and balls, but hers were holding my arms down. I just kept plowing along and I felt a tongue start to lick my balls and ass. soon the tongue was in my ass and I was ready to cum. She realized it and said I was not allowed to cum yet. she pulled off my cock and moved up a bit. that was when I could see her friends at the foot of the bed. the girl, call her G, was holding my thighs apart as her boyfriend, P, was licking my ass. He then stood up and kissed her deeply. I felt his cock pushing against my ass as my girlfriend said "enjoy this". She started to stroke my cock and G was stroking Ps cock and aiming it into my tight ass. I lifted up a bit and she spit on his cock and my hole. He pushed and before I knew it he was in me. so I was now getting fucked and stroked, very nice. My girl meanwhile was in a three way kiss with G and P. She had turned so her beautiful ass was right in my face. I kissed it and tried to lick her hole. It was all too much and I grunted a bit before I started to cum. That made P start to cum in my ass and G, who was fingering my girl, was encouraging all of us to cum. My girl definitely came too. P stayed in my ass for a minute or two to soften up and then pulled out. After we calmed down, my girl said that she wanted us all to fuck since the first night I asked her out but wasn't sure if I would agree so they figured this was the best way to introduce it. Turns out P was not really Gs boy friend, more of fuck buddies as he really preferred guys and she preferred girls. My girl said she suspected that I was into guys but wanted to be sure. She said that one of the nights we fucked, and she rolled me over and dry humped my ass grinding her pussy into me convinced her that I was good with it. We all messed around several more times after that night, but nothing was as exciting as that special surprise from my girl friend.