I was so turned on that my cock just stayed hard, not the usual case, and I knew that we were just beginning. As I turned to face Chase in her seat, ... suddenly became aware of someone directly behind us. I guess that while we were wrapped up in our own activities, another voyeur had moved into our area. I turned my head to just barely take in this new presence, and was shocked by what I saw. It was a young guy, no more than 25, (you know the type, with the baseball cap on backwards), and in. Opening one she took a swig. He grabbed the bottle off her and drank the whole bottle dry. She opened the second one, he took that and again drank it dry telling her to find some more.Annie stood up next to him. He started to feel stiff. The drink has a mixture that paralysed the skin. As Annie had eaten the berries it did not affect her. Just then her Grandfather came out of the bush and handed Annie a box cutter. He told her to just cut the clothes off not the skin yet. Together they cut off. I gasped as I glanced over and saw Grace, her head propped up in her hand, grinning at me. I quickly rolled to the side, away from her. She giggled."It's ok, Mark. I'm so sorry. I've been so selfish, stealing your room like this. We've been so close, just like friends, and after growing up together, I totally forgot you're a man as well as an awesome cousin."My heart was pounding. "I was dreaming about last night"She giggled some more. "Oh cuz it's completely natural. Don't even worry about it.. Like last time, Amy had lain a bunch of beach towels in a circle on the ground and had started describing the next game as people walked up, "For the balloon toss, I want all the men to lay on the towels on their backs in a circle with their feet facing the middle."What the hell, Ken thought to himself and, again, lay on a towel."Guys," Amy continued, "most of you remember the rules from last time. You must keep your hands behind your back at all times." She handed each man one of those.