My wife and I were on a remote beach with no one else around. We could see a long way down the beach and figured we would see anyone coming long before they could tell what we were doing. We started out just nude sunbathing, but seeing her naked body in the sun got me turned on. Before long we were making out, touching, and then fucking. And then a couple walked out of the trees right behind us. They were less than 30 feet away and had big grins on their faces. Fortunately my wife didn't see them or she probably would have stopped. I found it hot to have an audience, especially when the guy pulled off his wife/girlfriend's top. It was great watching him fondle her spectacular tits as they watched. Just as my wife was about to cum, I told her we were being watched and pointed out the other couple. She turned her head to see them and then had a huge orgasm while looking them in the eyes. That triggered me too, and I filled her with my cum. As we both slowed down, the other couple thanked us for the show and then walked off down the beach.