This isn't the most unique place I've had sex, but it was memorable. This happened about ten years ago but I remember the details vividly.
I had just gotten a job with a work crew where my new girlfriend Vanessa worked. She was a gorgeous, confident Jewish woman of 28, with sandy brown hair, a thin frame, small ass, and enormous tits. Due in part to her small frame, she was actually an E cup. They were beautiful, remarkably firm, but she considered them a burden.
It wasn't a secret that we'd just started dating so when we had a job in the mountains, we camped in the same tent together. After a night of drinking and smoking pot with the crew, we were awakened at dawn by our boss and my field supervisor making coffee about fifty feet away at a picnic table. We could see them through the half-sheer door flap of our tent. Vanessa unzipped her sleeping bag and nestled close to me. I unzipped mine and spooned her as we tried to catch a little more sleep.
We heard the zipper of another coworker's tent open and the morning chatter begin. I had a hard on under my boxer shorts and she started grinding her ass onto my cock. I started to kiss her neck and slowly pushed my hands under her thermal top and began to caress her breasts. As her ass pushed back and forth into me in an almost figure-eight motion I groped her and occasionally pinched her nipples.
At that point, she turned back to me, kissed me, and then leaned forward to see our boss and coworkers drinking from tin camping mugs and talking quietly among themselves.
I brought my hand down across her breasts, down her stomach to her hips, and pulled her back to me. I reached down her purple panties (for some reason I still remember the color) and pushed my hand down her landing strip. She twisted back and grabbed my cock. After about thirty seconds, I pushed back her panties and my cock found the warm trim between her legs. I slid myself back and forth across the outside of pussy.
She once again leaned forward to check in on our coworkers, and as she saw my boss pick up a skillet off the bench, I slid my cock into her pussy. She let out a little moan. I pulled her back to me and slowly and gently fucked her as we watched our crew prepare breakfast.
She was normally very loud and rambunctious in bed, but this morning, as I reached around her and put my fingers on her clit and slowly gave it to her, she just inhaled and exhaled deeper and deeper but not so loudly that anyone (I hoped) could here. I quickened my pace and she started rocking back into me to meet my thrusts. Her thermal shirt was up mid chest at this point and I could see her voluminous breasts spilling under the fabric. Her breathing grew stronger, and with our coworkers all of twenty paces away, I fucked her harder and we could here the familiar--fap-fap-fap--of our bodies meeting.
It seemed clear that they could hear us at this point, but I no longer cared. I pushed her over onto her stomach, rose completely out of my sleeping bag and pushed my cock back into her. She let out a breathy squeak and after a half dozen strokes, I pulled out and came on her tight little ass.
It was one of my best days camping ever.