My girlfriend and I used to go camping along the canal. We would drive down this long farmers lane to where the canal crossed a river. We camped there because it was quiet and most people didn't know about it. That and we could camp there for free.
So we were camping there one weekend, and it was late when a group of people showed up to camp as well. Three guys and two girls asked if they could join us. We said sure and started talking with them. Come to find out, they were all into swinging. There used to be three girls, but they had recently broken up.
They asked us of we wanted to join. I was kind of interested, but my girlfriend immediately said no. We sat and watched as they stripped off their clothes and started having sex. Two of the guys spit roasted the one girl while the other guy and girl were fucking. The sight of them having sex was like a live porno. It naturally got my girlfriend worked up and we stripped our clothes to have sex with eachother.
At first they didn't notice we were naked. I was sitting in the chair with my girlfriend on her knees in front of me, sucking my dick. Then one of the guys on the spit noticed and walked up behind my girlfriend. He gestured to ask if it was okay and I shook my head yes. He knelt down behind my girlfriend and started to rub her pussy with his hand. She quickly turned around to see this other guy, and then turned back to me with a look as if to ask whether I was okay with this. I whispered it's ok, and she went back to sucking my dick.
I watched this guy continue rubbing her with his hand, and then scoot in closer putting his dick up to her pussy. With a few slow thrusts, he shoved his dick inside my girlfriends pussy. I could tell she liked it as I could feel her moan while sucking my dick. He started slow and first, but then worked up to a good rithum. A few times my girlfriend stopped sucking me, and I was sure she was having an orgasm.
He was the only guy to have sex with my girlfriend other than me that night. After he finished, my girlfriend jumped on top of me and rode me to finish. After I finished, we went to our tent and went to bed while they continued to fuck eachother into the early morning. The next day we got up and left before they awoke. To this day I still don't know who they were are even what their last names were.
My girlfriend and I eventually married and we're still together today. We'll sometimes talk about that night, but we have never repeated it nor have we ever had sex with anyone else.. but who knows, maybe someday we'll run into another group of swingers, and I'll get to watch another guy fuck my wife doggy style again.