A while ago my sister Gina's wanker of a husband Colin made a pass at me. I told both my husband Craig and Gina what had happened and Craig thumped the creep. I told Gina she should get revenge on the slime ball by playing away while on holiday but I was amazed when she told me what had happened on her return. Four young studs had anally gang banged her while Colin and the friends they go on holiday with were on a jeep safari. When her fuckers had finished with her they handcuffed her to the table which is where Colin discovered her on his return, naked and covered in love bites and spunk. Her sexual adventures got even kinkier and finished with her being used and abused in a sex club by ten guys, including the original four studs and two tattooed lesbians. Afterwards Gina told her cuckold of a husband that she wanted him to arrange a gang bang with 40 guys for her 40th birthday. As the day drew near though he said he had no intention of doing so. Gina then got in touch with Nathan, one of her holiday fuckers, who was black and had the biggest cock Gina had ever seen. Nathan agreed to arrange the birthday gang bang and three days before her 40th arrived at her house and after fucking my slut of a sister senseless again told her he had advertised for 40 guys to fuck her and after posting the video of the sex club orgy had been successful. More than 40 had agreed but Nathan had made the proviso that they should all be black in order to tub my sister up with a black baby. Gina was delighted but then Nathan told her that at least three more slags would be needed to suck the cocks of the studs before they fucked Gina and to be fucked themselves after Gina had been filled with spunk, Nathan called this "crowd control". He asked Gina if she had any sisters who were dirty bitches like herself but Gina said that although 44 year old sister Rose was a big titted slag who loved extra marital cock the other sister, myself ,was much younger at 33, happily married and unlikely to participate. Nevertheless Nathan rang me and asked me to participate in the gang bang but I told him I couldn't because I was happily married and loved my husband. He told me that he had just fucked Gina up the arse with his 12 inch cock and was now doing the same to Rose and would love me to be the third sister to take his cock. Again I reiterated that there was no chance, but he said that he was going to take both Gina and Rose to be shaved pierced and tattooed at the local parlour in order to show the world they were his bitches. He also said that the wife of Rose's married boyfriend, called Susan had agreed to take part in the gang bang , that they only needed one more participant and that having seen photos of myself he thought I was gorgeous and thought I would be perfect. I don't know why but I decided to go the parlour, probably to check that my two slutty sister were safe. When I got there they were both inside having their tattoos done while Nathan was in reception. He introduced himself, told me that he was disappointed a beautiful woman like me didn't want to take part in the gang bang but that he respected my decision and that my husband was a very lucky man that he had such a beautiful and faithful wife. After chatting for five minutes he excused himself saying that he had to go and have a piss, and I found myself saying "If I strip naked, why don't you piss on me?" In my younger days before I got married I had been a real piss slut but Craig wasn't really into water sports and it was something I missed. Soon I was naked, with my nipples erect, and Nathan proceeded to piss all over my face and tits before encouraging me to open my mouth wide and jet pints of hot,steaming golden nectar down my throat. When he'd finished Nathan said he knew i'd turn out to be a dirty bitch like my sisters and what had happened to the faithful little wife. I told him that as far as I was aware drinking another man's piss wasn't being unfaithful. With a huge grin on his wife and with his swollen cock pointing obscenely at the ceiling , he asked me if allowing another man to fuck my throat was being unfaithful. I groaned no, and began to drool lovingly on his monster cock attempting to take the whole mammoth length down my throat, eventually after much gagging and choking I succeeded before he iced my tonsils with his thick spunk . Going to his coat Nathan returned with a big bottle of baby oil and nipple clamps. He attached the nipple clamps violently, anointed my naked body with the oil and proceeded to bugger me violently announcing, "Taking another man's cock up your arse is not really being unfaithful either is it?". After the best anal fuck of my life, and there have been plenty as Craig is a real anal afficiando, he hosed my bowels with his seed. Still were were both insatiable, and he begged me to slide my tongue up his arsehole which I lovingly did which made him instantly rock hard again. By the time Gina and Rose had returned, both looking stunning with shaved cunts, pierced nipples and tattoos proclaiming them to be black cock sluts, myself and Nathan had agreed that I would be the principal one being fucked by 40 black cocks at the gang bang with Gina joining Rose and Susan as fluffers. So addicted was I to this black adonis and his beautiful cock that I would have agreed to anything he suggested. At his insistence I flushed my contraceptive pills down the toilet there and then before agreeing that Nathan should take me home and show my husband the sort of slut I really was. Next time I will tell you about the gang bang and some of the surprises that happened to me and my sisters on that night