My wife and I were staying with friends of ours for the weekend...we were in our early twenties and i had always known that my friend fancied my wife and that she fancied him....His wife had gone to bed early as she was not well and we were watching tv...I was also tired and went to bed leaving my wife with my friend...after about half an hour my wife came upstairs to bed she was obviously aroused and told me that they had been on the sofa together and started kissing...she said that she had told my friend that they must stop otherwise they would end up going too far.....I asked her if she had wanted to carry on and after hesitating she said yes very much so....I told her that she should enjoy herself if she wanted to and after some persuasion she agreed....she stripped naked and put on a short dressing gown...I took the belt so she had to hold it together to protect her modesty...she was to go downstairs on the pretext of getting two glasses of water and as she came out of the kitchen let the gown fall apart revealing her naked body.....she told me later what happened...she came out of the kitchen carrying a glass of water in each hand and my friend was standing by the door...he immediately slid his hands under her gown massaging her breasts..took the glasses and then started kissing my wife passionately...she said that she then dropped the gown and stood naked in front of him...he pushed her back on the sofa and started licking and sucking her pussy...she helped him strip and was soon sucking his cock...she said she had lost control by this time and just needed to be fucked...which of course he did....she came back to bed and thanked me for letting her enjoy this fantasy...she promised she would not do it again without permission....I wonder why my friend watched tv most of the night for the rest of the time we were there!!