My ex lived on the Jersey Shore, specifically in the Avon-Belmar area. I had just graduated from college and was working in NYC - and decided to have my vacation in her area. I rented a room at a place in the area that did apartments and single rooms for the summer.
One night, we had dinner with her parents - and then walked to the boardwalk and the beach. Since she couldn't stay with me (she was my gf and it was their area), I think both of us we were a bit horny. So we walked on the beach, and I was grabbing her ass a bit. We were chatting and playing a bit, and finally I kissed her hard. We walked some more and then I suggested we go under the boardwalk. Now, I had never done that, and my guess was she hadn't either.
There was about a two foot clearance between the sand and the boardwalk. But when you got to the sidewalk wall - it was about three feet deep from the street above. We started making out, and I started to make a few moves. I went to her tits, playing with them, and opening up her blouse and her bra. I pulled out her nipples and began to kiss them, lick them, and pull them to see how far she would go. She didn't resist, and kept moving my hands on her nipples. I moved then to her pussy, rubbing her, and started to remove her shorts and panties.
I then got more aggressive. I started to push her shorts off, and got them about half off when she said she heard something. Sure enough she was right - a couple walked past above our head. It was then I realized there were people above us - and that really turned me on!! So - I put my fingers in her pussy and pushed for all I was worth. I then fully removed her shorts and panties, so all she had on were the shirt and bra hanging off her shoulders.
I pushed her down and started to move my fingers in and out of her. She was laying on the sand, moving all around, and then mentioned she was getting sand in her hair and up her ass. I took the shorts and put them under her ass, and then took her shirt off and put that under her head. I then looked at her - she was completely naked!
I had to catch my breath! She was completely naked under her neighborhood boardwalk!! Laying there, completely naked, and me fully clothed. The site of my cute little girlfriend totally naked under the local town boardwalk was so incredible! I lifted her ass up and started eating her out and playing with her pussy. She was moving all around - she was getting into being eaten out with people right above her.
I stopped and she said " Don't stop! Why are you stopping?" I said - "Wow - look at you! The star student, Dean's List scholar, the perfect girl, completely naked under her town's boardwalk; getting her pussy eaten out with all of her neighbors right above her!". We both looked up and there were a few different legs of people right above us.
That was it. The thought of the good girl being so bad send her in a frenzy. She began cumming like there was no tomorrow. She started to completely close her legs on that orgasm. With that, I jumped up - still fully clothed - and pushed my cock into her pussy and started fucking her.