The center was open and about 15 feet across, there was some trash s**ttered about, which I thought strange, as there was no other trash any where els.... I climbed down and walked around the bush and eventually found a small opening that led into the center, I crawled in and stood up. This was a great spot. I could see out and hear any one sneaking up on me and I had a perfect location to set up a camera overlooking the camp. I was only about 100 feet from the nearest camp site, but probably 50. It was Jenny, Sara's 16yr old sister, Tanya, her 14yr old cousin and Mary her cousin's classmate. Tanya and Mary were virgins, Tanya had popped her cherry while masturbating with a vibrator about a month ago.Robbie told them all to get naked in Dani's bedroom, they looked at Sara & Dani and they nodded. 5 minutes later, Robbie yelled at everyone to come downstairs into the dining room and moved the tables and chairs out of the way.Robbie then laid all the girls besides for Tanya down on their. She was sucking so hard and fast i was about to spunk but i wanted to fuck her so i just sat on top of the toilet pan and got her to sit on my cock and let her bounce all over me until i shot my hot load into her pussy . The hole time i was fuckin her all i could think about was her sister.The next day we woke up in our own bed stacey must have got up and kicked everybody out and went into her own bed . I got up to get myself a glass of water as i had a heavy hangover just as i was walking by. She closed the door while peering out. The last thing I saw was a devilish look in her eye. I quickly took off what I needed to and put into the bag. I put on the robe but still had my boxers on. I was sitting on the couch when she came out. She also had her robe on. She picked up my bag and hung them both on the door knob. I picked up the phone and called the desk to let them know they were ready to be picked up. She closed the door quietly and turned around. She said, "I can't believe it.