To start off my family and I go to a beach on the ocean with lookout towers all along the coast for sightseeing. This year we all kinda split up and did our own thing. My wife and I decided to walk the beach and stay close to the car as you can't smoke on the beach so we dip off every now and then and grab a smoke at the car. She was looking especially gorgeous so I decided to test the waters and see if the ocean air was working it's charm on her as well as it had me quite worked up. So I posed to her a new "slut challenge" a game we play to push her typically shy self into being sexually liberated and doing spontaneous things. I decided to go easy on her and as we sat in the car I asked her to flash me. Taking me up on it eagerly as the oceans magic was working on her as well she lifts her bikini and flashes me for a couple seconds. Wonderful I say as I smile from seeing her beautiful breast but I'm just getting started, Now that I know she's feeling naughty I decided to push her and see what I can get her to do. Thinking over several tamer challenges I say a few but they all seem a bit weak until I stop on challenging her to let me fuck her in the middle of the crowded parking lot where we could get caught at any point. She laughs at first thinking I'm joking but soon sees I'm serious she takes it into consideration then with the most amazing determination in her eyes she says fuck it why not and walks to my side of the car I greet her stepping out the driver seat and positioning myself behind her we both look around a bit then she pulls down her bottoms and I waste no time getting hard instantly with the thrill of things I spit on my palm n lube my dick and then with a skilled thrust I'm now pounding into her. It was like the ocean sounds grew to a high frenzy as my head was ablaze with joy and excitement as I slammed into her over and over holding firmly onto her hips as I did. For three or four mins (I know not long lol) we were in bliss experiencing each other in the parking lot nestled between to trucks we backed in the sun and ocean breeze as we carnally enjoyed the taboo act of fucking in the open public parking lot as if we didn't care if we got caught at all. Suddenly tho we her foot steps and both struggle to regain our clothes and correct our selves before they crest the back of the trucks we're parked between. We managed to achieve it as we we're back clothed and all smiles with each other having been able to atleast do as much as we did but it hit me like a thunder bolt of dread and embarrassment aside look across the parking lot to the tower that loomed over us and saw the sightseeing tourist at its peak floor starting and clapping at us nothing but smiles and could Suddenly hear them peering and encouraging us to keep going one shouted "you can do it"!! Both me and my wife turned bright red and slightly curled inward from embarrassment of having been caught plain as day. We both quickly laughed off our shame and said least it was a memorable vs the generally plain view of the ocean that day. Not wanting to be confronted by any of the people who just caught us we decided to head down the beach as we enjoyed the ocean some more.