We toldher she just had to get used to it and josh handed her two more and told her they were to practice on. She said how do I practice on them by su...king on them we all started laughing.We all started making sexy jokes about her sucking skills I told josh I know first hand thatshe was a good sucker she laughed and punched me on the arm saying you know I don't likedoing that, Josh replied by saying Im always here if you want to do more practicing, all thetime we were talking kelly was swaying. She knew Robbie was there but he would be in the study working and she could talk to Jean privately in the kitchen. She went round next door and as usual let herself in the back door. Jean wasn't in the kitchen and instead of calling out for her walked into the lounge and got the shock of her life.'Oh my god,' she shouted as she looked at her twin sister riding up and down on the erect cock of Robbie and it was obvious by the look on her face that she had just cum.Jean immediately jumped off. I am sure Amy has had a lot of men although I have not said anything to her. You might have had her bend for you a number of times, I don't know. At least, though, I would know she is getting fucked by someone decent and respectable. I am sure she is being careful though. Have you ever had a really good blowjob?" she asked with a smile on her face.Tim went scarlet red, like a beetroot, even though he was very relaxed."I am not sure I should be talking to one of my best friend's mothers about. "Matthew, please listen to this, it is important. I am expecting at least one new sex act you can perform on me and I will think about what to do to you." Sarah added with a playful little smile on her face.Matthew was shocked, first of all everything was going to end and now his sister was kinkier than he ever thought possible.He was eager to do his research on his new task, the internet being a wonderful research tool, but felt compelled to tell his sister what he had been dying to tell.