My wife and I have often fantasied about her or me fucking someone else whilst we\'re in bed. It guarantees her cumming if she\'s thinking of me shagging someone else, and I get off on thinking of her with one of her ex boyfriends. I\'m 38 and my wife is 42, blonde, 5ft 8 size 12 with big tits. She\'s always been a headturner and there have often been occasions when I\'v suspected she\'s up to no good. I will point out at this stage that this really is true. No fantasy, no ten inch cocks, just a true account of last Friday night. Last Friday night she was out with work as one of the girls was leaving. It was to be a meal and a few late drinks in town. I dropped her off and she looked fantastic. Not at all slutty, but a nice black skirt and a glittey halterneck top which she knew made her tits look massive. I was supposed to pick her up at 12 but she texted and said that she would be making her own way home. Fantasy is one thing, but my mind began to race, and I sat at the PC wanking over what she might be up to. At around 3am she crept into bed. She was drunk but not pissed, and I asked her if she\'d had a good time. I was a little apprehensive now, but didn\'t really expect her to have done anything behind my back. She grabbed my hand and made me rub her pussy. It was slimy and hot and she had clearly been fucked that night. I fingered a very sloppy fanny and my cock was beginning to grow. She started sucking me off like I\'d never had from her before, a really slutty blowjob, loving the fingering I was giving her. Before long she lay her body on top of me and I easily slipped in, and she began to tell me what had happened. One of the lads at work - I say lad, Paul is 35 - had paid her a lot of attention at the meal. They sat together talking and she said that, whilst she had never fancied him before, she found herself getting in the mood. This continued after the meal and into down, where they stood with the arms around each other in full view of their remaining colleagues, kissing and flirting. Then she dropped the bombshell. On their way to the next pub the two of them sloped off and let themselves in to their office building. They couldn\'t get right into the offices, but could into a communal stairwell and they made their way up to the fourth floor where they couldn\'t be disturbed. I was trying hard not to cum now. My wife was sliding up and down my cock and it felt fantastic. She told me how she lay on the stairs and he knelt between her legs, kissing her and roughly feeling her tits. She realised that things had gone too far to stop and she removed her top and let hime enjoy her tits. She said that she undid his belt and pulled his shorts over his cock. It wasn\'t a monster, but was big and thick enough to stisfy her, and she said it was one of the hardest she\'d ever seen. She let him fuck her mouth whilst he kneeled over her. She said he was rough and treating her like a slag. I suppose she deserved it. Before he could cum, she took of her stockings and got on her knees. She said that she let him fuck her bareback. He entered her with ease and it felt good to feel another cock in her cunt. AFter a few thrusts he tried to get up her arse, and SHE LET HIM!. She never has for me, but she loved being a whore. They finished up with her on her back watching jis cock sliding in and out of her pussy. He recorded a bit of it on his mobile, the dirty bastard, before withdrawing and cumming over her neck and mouth. SHe then sucked him dry and enjoyed putting his cock back in his shorts and trousers. They sat chatting before he fucked her again within the half hour. As she was telling me how good it felt to taste his cum, I shot my own spunk right up into her fanny. I didn\'t know what to think. This had always been a fantasy, but I\'m not sure about the reality. We continued to have great sex all weekend, but she\'s already began to put her phone on silent and keeps slipping away to make calls. Maybe it was one night of drunken stupidity, or maybe she\'s developed a taste for fucking other cocks. I\'ll let you know.