Like some of your stories, I’m not sure if this counts as swinging but I’ll tell it anyway. I’m married to a fantastic woman, attractive with a great figure and an amazing attitude to life who is very open when it comes to sex and by that, I mean she will try anything. Next to us is a skinny runt of a guy who I detest. But he is one of those ‘I know it all’ sort of people and my wife thinks he’s funny, personally I can’t stand him. Now, I’m not going to bore you with how all this happened but I noticed that he and my wife started flirting a lot and talking about things that you don’t talk to stranger about. He of course kept bringing up sex and being suggestive. His wife, is a nice girl, pretty, like us in her late 20’s , a bit skinny with a pretty flat chest which will be important later. My wife on the other hand has curves in all the right places, is attractive with a large firm chest, and you will understand why that’s important later. In the end the flirting caused one or two arguments between my wife and I but didn’t stop. One of the discussions that I thought were inappropriate was when my wife who has said on more than one occasion that she wanted to try an anal fuck brought the subject up in front of him. Apparently, my cock is too thick for that which I’m not into anyway. The runt of course announces that his cock was just the right size if she ever wanted to try it, laughing to make it sound as though it was a joke. That evening there was yet another argument and I said that if she wanted to let him put his cock in her arse then she should go for it, not thinking she would do anything. A week later he’s back round, his wife is out with friends. There’s a lot of stupid talk and we’re drinking a lot of wine, in fact way too much. He asks the wife if she’s thought about his offer to ‘help him out’ meaning me. He reminds her that his cock is the right size to be able to shag her in the arse. I’m not sure if at this point, she’s actually agreeing to it or just messing around but she says ‘well I have his permission’ pointing at me. Me in my drunken foul mood suggest that they go and do it to get it over with and I walk out. Not you have to understand that I’m pissed at this point and I talk crap when I’m pissed and agree to anything. I decide to make myself coffee to try and sober up and stave off a massive headache which I get when I drink too much wine. The wife calls out to me to ask if I’m in a bad mood, I shout back ‘NO’ she replies, ‘so I can then’, I tell her to do what she wants honestly not thinking anymore of it. The coffee didn’t; sober me up as much as what I saw when I walked back into the living room. My wife is naked as is the little shit from next door. She’s standing facing the wall, her breast squashed against it. She has a glazed look on her face, her because the little fuck has his thin cock in her arse and if pumping away. The guy next door who I can’t stand is fucking my wife in the arse in my living room. The fact that I went nuts didn’t stop him fucking my wife, she reminds me that I said it was ok and that she’s only seeing what its like, and from the sound of it she liked it. ‘fuck me in the ass’ and ‘fuck this is amazing’ is all I can here her say. He’s thrusting away, his hands now gripping my wife’s big tits. What I should have done is put a stop to it, what I did was storm out, coming back an hour later. My wife was on her own, he had left. She sat on the sofa waiting for me. I walked in and she gave me that sheepish look she gives when she’s bought something expensive. ‘well’ I said, ‘sorry but it was amazing’ was all she could say. Apparently, he made her cum hard and it went on for some time. She reminded me that I had said it was ok for her to try and she assured me it was a one off. Three days later she had convinced me to let her do it again. I said that I didn’t want to know but I came home in the evening to the sound of my wife moaning and grunting. I walked up stairs and there in the bed was my wife on her tummy, the little shit from next door laying on her back, his short skinny cock back in her arse pumping away. I watched my wife with her big tits squashed underneath her with plenty of side tit on show bright red and sweaty, moaning and pleading for it to continue. Him, just as red and sweaty as her, with a big grin on his face. He grunts at what amazing tits my wife has, ‘not like the tiny things my wife calls tits’ he grunted just as he cum’s inside her to cause her have very long and loud orgasm. I hated this guy. In the end I decided that his wife should know. Apparently, she already knew something was going on and didn’t seem that bothered, it appears that he plays around a lot and she didn’t’ relay care. I told the wife what I had been told and she was mad, he told my wife that this was the first time he had done it and it was just a thing for the two of them. I decided to plot my revenge, which it turned out after the event my wife was ok with. Apparently, he was dead against his wife playing away but thought it was ok for him to fuck my wife. So, I asked his wife to come to my house for me to fuck her and let him catch us. She was more than happy. My wife warned me that he was coming round one evening so I sent a text. He comes round with his usual smarmy grin and he and the wife disappear upstairs. His wife comes in at the right time and I take her to the spare bedroom next door and I undress her. Actually, she was quite hot, a bit skinny and flat chested but there was something about her that makes a guy very hard. She squealed at the size of my cock and compared it to her husbands which made my day. After a quick suck of my cock I had her on her back, my tongue lapping at her tin breast and round her tiny but long and hard nipple, my hand in her pussy. She’s moaning almost as loud as my wife is next door and I tell her to make as much noise as she likes. I push my cock into her small pussy and I fuck her hard, her titties wobbling, her legs wrapped round my back. I love the fact that she’s calling out to me that my cock is so big and hard as my wife is grunting ‘fuck me, fuck me’ next door. My new fuck buddy begs me to be rough repeating ‘just fucking do it’ adding that she wanted it hard and rough. I fuck her like an animal, nothing barred. I was fucking her doggy with my hand gripping one of her tits when the door opened. Standing there is this skinny little runt who thought it was ok to fuck my wife going apoplectic, my bollock naked wife standing behind him, her sweaty tits heaving with a big grin on her face and that made me laugh which sent him into a rage. He didn’t have the balls to do anything about it except stand there and shout, his skinny limp dick bouncing as he raged. My laughing made him even more annoyed. His wife just tells him to ‘fuck off and grow up’ then gets on her back and pleads with me to ‘put it back in’. The fact I do as I’m told and start to fuck her again stops him in his tracks, my cock in as deep as I can get it to go, the fact that my wife joins us in bed defeats him, making him grab his clothes and ( I assume fully dressed) storm out whilst I finish what I had set out to do. I exploded cum into her tiny pussy as my wife sucked on the girls breast, my cock sliding past my wife’s hand which was rubbing her pussy with my cock still in it. And when I had finished, the wife took over grinding pussy on pussy, tongue in her mouth. I was hard again in seconds and went in for seconds. The arse fucking is over, apparently, he sulks but she had told him he can do what he wants with whoever he wants as long as she can keep coming round. The sex is brutal, the three of us doing whatever we want to each other (within reason). The wife misses her arse fucking so bought her a skinny dildo to push in her arse whilst we fuck. But best of all, I love the look on his arrogant face when I fucked his wife in front of him, but I love the way my wife reacted. Not angry, just keen to join in.