I walked down the beach as the sun hung low in the sky over the lake. The beach was all but empty. I passed the edge of the trees, when I heard a noise. I stopped and listened. My eyes went wide. I knew that sound. The moans of sex were unmistakeable over the gentle lapping of the waves on sand. I moved towards the trees and listened to the moans getting louder. I looked through the trees and saw the source.The couple was...