She tried to give me a severe look of reproof, and failed. We got on so well Sis asked if we wanted to stay that evening although we had not planed to as she said they were going to have a FUN evening, with this couple so we said OK, We sat around the lounge watching the latest news eating pizzas, Then after this Sis said who going to screw who tonight, Ian looked at me with that look of I wouldnt mind having you and rubbed his trouser front, Sis said why dont we all get naked, Brian was looking at Sarah and she gave him the come on look so he went over to her she stood and they fondled with other for a minute or two, Judy (my Sister) said lets put her on the coffee table which was quickly covered with a sheep skin rug, Sarah took her place on the rug and lay back opening her legs then swung them back so her legs were behind her shoulders and he feet behind her head, I said wow how the hell does she do that, Well Brain wasted no time getting on his knees and his tongue in her, I could watch in amazment as how she could put her legs like that, Id seen acrobats do it on TV but never in real life, Ross came over and knelt beside her taking her hand and guiding it to his dick, It seemed like no time before she was gasping and crying out and after another few minutes she cried out some thing about coming then she started to buck and gasp and cry out asking to be fucked, Well Brian was quickly up and inside her, Ian asked if she wanted it up the rear too she nodded, Ian asked Brian if he wanted front or back, Brian said back so they rearranged so that Ross was on his back and Sarah climbed on impaling herself on Ross while Judy guided Brian to her rear end, So they did a sandwich on her, I had had anal a couple times but it never impressed me as it hurt too much but Sarah took it without a whimper. I pushed it in further as Teresa shouted she wanted me to finger fuck her ass. I never did plot anything, but it did seem to me the week might hold another surprise or two.