My name is Jon and at work I'm known to be a driven Production Manager something that doesn't exactly fit with my home life.

Judy and I got married when we were both twenty. We lost our virginity together. After three years of marriage though she seemed to go off sex, with me anyway. Inevitably, I got frustrated and our marriage went through a rocky patch.

One day I needed to use her nail scissors but instead in her bedside drawer I found a six-inch dildo and I went mental. She told me that her girlfriend, Elaine, had given it to her as a present to compensate for my tiny dick. Eventually, I calmed down and realised that Elaine was right, I owed her the right to use a dildo because my dick is so small (three and a half inches long with a three inch girth when hard).

My dick did not grow much after puberty so I got very good at hiding it at school and college and I guess my driven nature at work might have been down to me trying to compensate, who knows?

So after we had talked it through, she would let me use her dildo on her when we made love and then she would let me enter her after she had cum. She seemed very loose after using the dildo but I as have always finished quickly that wasn't a problem. At least she was happy and we were having more sex.

That black dildo kept her contented for another few years then she started to call me "tiny dick" as a term of affection, at first. Though when she had a few drinks she would often turn nasty.

"Why did I have to marry a guy with a tiny dick? Why couldn't I find a guy with a proper cock like every other woman?" she would lament.

To try to recover the situation, I had the humiliating task of having to buy a seven inch long wit a six-inch girth strap-on dildo which fitted around my waist, just above my dick. When she wanted sex, I had to put on this contraption and use it on her and for the first time in our married life I was able to make her cum by "fucking" her.

She really couldn't get enough of it. She started calling me her "big cock" lover. It was great to get between her legs and make her cum but she said it spoiled the illusion if I penetrated her afterwards with my dick so she would give me a hand job or sometimes a blow job instead. At least this was progress of a sort.

One evening years later, I went into her office at home and I caught her watching some big cock porn on her PC. Her knickers had been tossed aside, she had one leg on the desk and she was rubbing her clit and moaning. I was shocked and told her that she was a slut but she was totally unrepentant.

"I'd bet you'd like to see me properly fucked by a big cock like this one?” she said.

I was angry and humiliated but deep-down I was excited by her words. Secretly I suppose I knew that this might be on the cards one day.

I do a lot of d-i-y at home but I when to leave the plumbing and electrical work to the experts. For that sort of specialist work I would always "get a man in" to do it. So I rationalised to myself, would this situation really be any different? Later that evening I asked her.

"Your thirtieth birthday is coming up next month. Would you like me to find you a well-hung stud for you as your special birthday treat?"

"Are you serious?" she said her face a picture.

"Yes, I think you deserve it for putting up with my small penis for ten years but its got to be just a one-off Ok?" I replied.

Lloyd was a guy who worked for me who I knew fancied Judy. We regularly played squash together and he smiled the first time he saw that I had a small dick. Often he used to tease me about it. He joked with me that if my missus wanted a real man she need look no further than him.

I hadn’t seen him hard but I knew he was much bigger than me and he often would have a big semi on for me, when he got changed, showing it off as well-hung men always seem to do.

So after making my birthday promise to Judy, I took my courage in my hands and approached him one day at work.

"You know you are always going on about having sex with Judy? Well, this is your lucky day. It is her significant birthday next week and I want you to help her celebrate it by fucking her for me."

His jaw just dropped, for once I had shocked him but he soon had that smug look back on his face just like when he used to beat me at squash.

Finally after lots of rather personal questions he said "Ok it will be my pleasure, I'll do it".

To introduce himself he sent me some pictures from his phone for Judy, mostly clothed stuff but then some of his erect cock. To me it looked huge, long, thick and veiny with a floppy foreskin. I thought when she saw the pictures she would say that the fantasy had gone far enough but she studied each one closely and I watched her bite her lip when she saw his fat cock.

She purred like a cat "Oh, he will do nicely."

We arranged that on the Saturday night after her thirtieth birthday party Lloyd would call at out house and we would get to know each other a bit better over drinks and then see if anything developed.

I don’t know who was more excited of the two of us waiting for the doorbell to ring. She looked drop dead gorgeous. I had bought her a sexy red bra, knickers, stockings and a suspender belt that showed off her full 36c tits and contrasted with her long black hair.

She was trembling with excitement but she wouldn’t let me touch her. Tonight if she approved of him she was going to be Lloyd’s woman. I could watch and make sure everything went well but if he stayed over I was sleeping in the spare room.

Then the doorbell rang: looking back I lost her from that moment.

The door opened and Lloyd was standing there with a wide grin on his face. Without any hesitation he took Judy in his arms and kissed her and she kissed him back. We drifted into our kitchen diner and I went to open one of the bottles of champagne she had been given for her birthday from the fridge and three flute glasses.

She hadn't wasted any time, when I got back to them with the drinks she already had his fat cock out of his fly and she was slowly wanking his foreskin back and forth. His cock was huge compared to mine, I'd seen it semi hard before but even his pictures did not do his cock justice. It looked like an animal’s. They kept on kissing with him mauling her body and her pulling his cock to full erection.

Urgently, he pulled off her dress over her head leaving her in her red bra, knickers and suspenders with sheer black stockings. Dressed as she was she looked so fuckable I felt an enormous pang of jealousy.

He knelt down and took off her panties and her sweet shaved pussy came into view which he studied with his fingers then his mouth. Off came his shoes, shirt and jeans and Judy dropped down to suck his stiff cock but he just shook his head and led her over to the breakfast bar and bent her over it so he could take her standing backwards. She was extremely compliant.

I watched open mouthed as he took his thick penis in one hand and expertly found the entrance to her vagina. The fat purple head of his cock slowly eased its way into her pussy.

He fucked her slowly at first getting her used to his big cock. He pulled both her tits out of the cups of her bra and her nipples were by then both sticking out proudly. I was still fully dressed and I felt stupid just standing there, a real spare prick, with my little stiffy, watching my squash partner fuck my wife.

I moved around to the other side of the bar and held her left hand, the hand with my ring on it as he built up his rhythm. As I held her they both looked at me, her face was a mixture of thanks and lust and his was a look of conquest.

Watching them they seemed so well matched, both seemed comfortable in this position as if they had been made for each other. He certainly knew what he was doing, I would have cum long ago but he kept ramming his cock up her like some sort of athlete altering depth, angle and speed.

A lasting memory was the slapping sound as he forced his big cock into her tight pussy from behind. Judy finally gave a deep moan as she came for the first time on a real man's cock but he just kept on going not giving her time to recover.

He just kept on fucking her and she let go of my hand as he pulled her hair back and she arched her body as she came again, harder this time. I was so close to their action, I moved behind them and watched as his cock creamed by her love juice, pistoned in and out of my beloved wife.

The sight, sound and smell of them having sex got too much for me, I had to get my dick out and I shot my little load after just a few strokes. They totally ignored my moans as they kept on fucking, he had incredible stamina. Judy was moaning and sweating as she kept on cumming on his cock.

Finally, he roared like an animal and I could see his balls pulsing as he filled her pussy with his cum. He kept on thrusting for thirty seconds afterwards then stopped and pulled his softening cock out of her.

In her standing position his copious seed flooded out of her well fucked hole onto our slate kitchen floor. She was in sexual heaven as he picked her up and carried her upstairs to our marital bed, leaving me alone downstairs to clear up the mess.

And that, dear reader, is how I first became a cuckold.