we walk and then we see the couple again

Amy stopped and turned to me. “There’s only about ¼ of a miles left until we get to the end of this path. After the other night I feel very daring.” She pause, gathering up the nerve to propose what she was thinking. “I think we should get completely naked, hide our stuff behind that rock and get to the end of the path and back.” I was shocked. “Come on, you liked being naked the other night. There’s very rarely somebody on this path. I saw one person once.” I was hesitating. She grabbed her bra and removed it. I was staring at her breast again. Then her panties were down and she hid her things near the path. Of course all that time I was watching her pussy and ass. My cock was starting to grow. She turned back to me and I know she was disappointed so I quickly removed everything and hid my things with hers. It was her time to looked at me and it turned me on. Her eyes were on my growing member and she had a smile on her face.
So we started walking again, both of us completely naked (except our shoes) with absolutely nothing to hide ourselves is we saw somebody. I was the first the hear it so I stopped and signaled Amy to do the same. “What?” I put my finger in front of my mouth and the pointed my ear. She listen with me and we could hear a sound. I wanted to turn around put Amy started to slowly creep forward.
She moved as fast and silently as she could and I moved behind her. Then we could clearly hear : “Oh yes! Come on, suck it! It feel so good.” We moved more rapidly and finally we were able to peek at the action.
It was the couple from last night. The girl was on her knees sucking the guys dick.