I always encouraged my wife, Jo to keep me up-to-speed regarding any sexy exploits she encountered. I gave her licence, as we all know what its like after 10 years of marriage and trying to keep the flame alight. I was watching a late night film when I heard the key in the door and a car drive off. I asked whether she had to have a taxi home but she offered, "no, a great fella, Brian, gave me a lift". Further investigation revealed that he had screwed her and it was great but his car was not the roomiest and it had been too cold for it outdoor. I always liked to know more detail and found out that he could not take her back to his place but wanted to see her again. Jo was equally keen to see him as his cock was "to die for" and they had had a very hands-on snogging session too. It was always clear when Jo was about to meet up with a guy as she was extra particular about her appearance. The minimal amount of underwear was laid out on the bed for my approval and I always liked to suggest what she should wear that which might appeal as much as it did to me. It appeared that Brian had phoned her and invited her to dinner at a rather nice country restaurant. "and afterwards?" I asked. "I suppose it will have to be the back of his car, that is unless?". "Unless, unless, what?" I responded. "I thought perhaps you might agree to me bringing him back here, if he was in agreement". Knowing that she would be late, I went off to bed around 11pm and dozed until I was awakened by the usual fumble for the lock and the key turning. I did not hear a car pull away and from faint voices I realised that she had brought Brian home. When the light went on in the bathroom I seized my opportunity to confirm. Standing on the landing, she was no longer the freshly groomed lady. For one thing the blouse I had suggested earlier was only partially buttoned and her nipples were visible as she was no longer wearing a bra. I asked when she had removed the bra and was told that it came off in the Ladies as they had left the restaurant. Yes, she had had a fantastic night and she had suggested that he could bring her home for "a coffee" but she had explained in the car that I was a pretty liberal guy and she had hoped he would take advantage of her offer. I told her to tell him that I was asleep so they would not get disturbed but after around 10 minutes, I crept down and entered the lounge. They were both completely naked and she was kneeling giving Brian a blow-job. I did not expect the reaction I got which was for both of them to look over in my direction and for Brian to ask whether I was OK with it. Casual bastard, then milked it for all it was worth. Brian was obviously proud of his ample cock, did not mind that I was mesmerised by it and displayed it in every possible way and I had to agree with Jo that he did have lovely cock. When he left, some 2 hours later, Jo had been fucked in every hole and taken two loads. Brian was to become a fairly regular feature and just to ring the changes, him and I went out for a drink and on our return were greeted by our slut who was to take us both. I had admitted that I would not mind handling his cock as well as Jo and this was to lead to my one and regrettably only bi- experience, where I was allowed to briefly suck Brian, before my wife protested "hey, that's for me". Jo, in time saw less and less of him but that did not stop her being the eternal slut for which her cuckold hubby will be eternally grateful.