I noticed Joe walking over, with a large cup, almost bowl in his arm. He went underneath me, and did something under my chair, but I noticed, as he wa...ked away, he held the cup almost upside down, whatever he did, the cup was empty. I quickly found out what it was, as Rebecca turned the knob even further, as I found my ass almost being burned, the dildo was going that fast in and out of me. She then pushed the button... The dildo seemed to get even larger than it was originally, and I felt. She was more wicked and naughty when it comes to these kinds of things. But I had a habit of getting carried away with her taught. We drove down the hill side and reached a quiet and secluded place. It was evening and the water looked so pleasant and shiny. She got out of the car and we both looked at each other. She left her slippers aside and went straight into water. She inched deep into water with each step. I could only see her face after some time.She asked me to get into water but I was. Off came the bikini bottoms and from seemingly nowhere out came a vibrator. Nothing too large, but large enough to the job. She teased her clit, but in no time was inserting the vibrator into her pussy. She found a chair to get comfortable and sat down several feet away. I assured again, despite my cock telling her otherwise, I would not do anything she didn’t want. She could tie my hands if she wanted. The offer to be restrained was good enough. She moved closer. Again seemingly out of. .." and with that she handed him a Penthouse.Billy quietly said, "Ok," and then sat looking at his sister.After a minute, Sandi said, "Well, what are you waiting for?"Billy’s eyes opened wide as he exclaimed, "You want me to do it with you here?" Yes I do," she replied. Then to try to justify her presence, she lied and said, "I just want to make sure you do it right." What she really wanted to do was watch her little brother blow his first load of boy cum.Billy felt embarrassed and said, "Gee.