Some years ago we popped into my sister in law's house on spec and interrupted what can only be described as a rude food party night that they were having with 2 other couples who we knew, but didn't know very well. It was obvious that they had had a few drinks and were feeling a bit randy with the comments that were being made by the food on the table. My sister in law had made a sweet with an erect banana and two round profiteroles as balls, and some spray foam as pubic hair, they were obviously having a good time and our untimely arrival could easily have put a damper on things. We tried to make an escape, but my sister in law who is a bit of a prick teaser said that maybe I would show them my banana later! She is one of those people who you would really like to give here a good fucking as she can be a bit of a gob shite now and then, I think she thinks the same about me and I suppose I would agree with her. It was becoming obvious to me that the dinner parties that they have on a regular basis are a swinging session, I had thought about this some time previously but with the rude food party theme it was more obvious. my wife didn't suspect anything! Anyhow a couple of drinks later and the talking got a bit ruder and there was some flirting and it became much more obvious that there was going to be a bit more action to happen. My wife wanted to make a polite departure but her sister persuaded her to stay as she said "the night was young and the fun had only just started". We moved form the dining room into the lounge and it became obvious to me that the other 2 couples had been given a nod as they took it in turn to lead the conversation and the games. We were asked what our most embarrassing sexual moment was, what our best session was, and what we liked to do, this coming whilst the drinks were flowing and everyone was having a good time sharing stories and flirting. Eventually the sister in law blurted out that the girls wanted to see the men's bananas if you get my drift, me being a bit of an exhibitionist wasn't too worried and so got my banana out with the other 3 guys. The girls were howling by now and making lewd comments etc, my wife wasn't sure what to do but went with the flow. Next thing they wanted to see our coconuts, so we dropped our trousers so the girls could inspect our balls. My sister in law, Margaret, then suggested that it was unfair that we were the only ones showing something and pulled her top off and unclipped her bra, quickly followed by the the other 2 girls and my wife after some goading from the others. By now this was having an effect on our bananas and I was doing my best to keep it at 1/2 mast at least. The other guys then egged the girls on until they were naked and we quickly followed. I am thinking is it a case of sex with your own wife or some way of deciding who gets whom, this was quickly explained. The lads were given a ball each, numbered 1 to 4 we were to mix them up so the girls couldn't see them and each one corresponded with a bedroom which we went to. We were told that we had to wear a blind fold, no peaking, and to wait for further instructions, by now I was sporting a nice erect banana. About 2 minutes later the door opens and someone comes in, I was told no peaking but I couldn't fathom out who it was as the voice was distorted. Apparently the girls had a sort of voice box to speak through which distorted their voice, they had drawn lots to see which room they got, apparently its a 25% chance of getting your own wife, I hoped that this went the case. i was instructed to lay on the bed and the next thing I knew was that someone was rubbing my cock and then straddled me, not my cock but just across my waist, I reached up and grabbed a pair of tits to try and gauge who I had, but as the girls were all similar in size I was still none the wiser. Next the girl then moved up my chest and dropped her fanny onto my face, all I got was an instruction to lick, to be honest I didn't need that! I licked for England, found the clit, and didi the best i could! My hands were rubbing her arse up and down but that didn't give me a clue who it was, then i had a brainwave as I thought have a feel of their feet as I suspected they would have an idea of what I was up to. I quickly ran my hands over her feat and noticed a quite pronounced bunion on the right foot took a mental note for later! She then lowered he fanny onto my erect banana and gave me a great ride. After a few minutes she got off rolled over and grabbed my cock pulled the foreskin back and I felt a tongue run around the helmet, I hoped and thought for a blow job but all I got was a comment of "perhaps next time" I proceeded to give her a jolly good fucking from behind and whilst this was happening an alarm bell went off and she said 2 min to go. I shot my load, she got off and then said wait here for further instructions. I heard the door open and shut and then took the blindfold off and wiped my dick. The bell went again and we hooped back to the lounge, my wife looked quite happy, not sure who she had shagged though. I took my time examine feet and decided that it was Sue who had shagged me, as they were wearing dressing gowns it was difficult to see her fanny to gauge how much hair she had but i was quite sure it was her and gave her a knowing nod. The girls then announced that we were going to have 1/2 hour break and then the fun would start again! I can't wait, second 1/2 to follow.