For this story I have had to try something different. As the event happened in separate rooms I have tried to write my husband's part as well from his own words. I hope it works out ok.
We had known Tom and Cath for some years. My husband Bob worked with Tom and we had enjoyed many dinners and outing but just lately things had gotten a bit hotter.
This came about due to another couple who were also friends of Tom and Cath named John and Linda who, it turned out, were experienced swingers. They had brought some porn videos to the last dinner party and we all settled down afterwards to watch them. I was sat on Bob's lap whilst the other two couples sat on separate settees.
After a while the movies were having an effect. Bob was feeling up my tits and I was rubbing his erect cock through his trousers. The others were in similar action until Linda unzipped John and pulled out his cock, rubbing it slowly up and down.
This seemed to encourage the other guys and shortly there were three hard cocks on display and being stroked until Linda suggested that we all change.
She moved to sit next to Tom whilst Cath moved towards the armchair we were sat on. I felt a little push from Bob and he gave me a nod of encouragement so I got up and walked across to John, leaving Cath to sit on the arm of the chair and take Bob's stiff cock into her eager hand.
I sat next to John and gripped his hard cock. He grinned at me and started to hump up and down in my hand. I got into his rhythm and wanked him slowly at first and then faster as he got more and more excited.
I glanced across to Bob and Cath, she had a different technique as she held his cock with her hand upside down and rhythmically squeezed the head of his knob between her thumb and index finger. Bob lay back with his eyes shut and his mouth open as he enjoyed her ministrations.
Next, to Tom and Linda, and another surprise when I saw the length of his cock. Cath had always boasted about it but to see it in the flesh was another matter. It was not the thickest I had ever seen but at about nine inches it was certainly the longest. I wondered what it would be like to feel it sliding up my pussy, would it be too long? would it be uncomfortable? I supposed that there was only one way to find out but would we be prepared to go that far?
John's groans brought me back to the matter in hand, so to speak. From the noises he was making I realised that he was close to coming. I had not thought this through but it was too late now and he erupted all over my hand as he arched his back and pushed his cock as high into my hand as possible..
Pretty soon Tom also emptied himself into Linda's hand closely followed by Bob who managed to shoot his cum all over Cath's dress. Luckily Cath had a box of tissues on a side table and we quickly cleaned up before the ladies went to the bathroom to wash our hands and have a good laugh over what had just happened.
Linda asked Cath how she managed to take Tom's long cock and she explained ;
"Practise, darling, practise."
After coffee the evening broke up and Bob and I drove home. The excitement had got to me and during the drive I took my tights and panties off to allow Bob to diddle my clit until I came with a huge groan, a nice prelude to a fantastic fuck session when we got home.
Of course we talked about it during the week which led us on to more great sex and musings as to where it would lead. I think we had both enjoyed ourselves and wandered about taking things further.
A few weeks later we invited Tom and Cath to lunch at one of our favourite pubs. It was down by a river and afterwards we went for a stroll along the river bank, enjoying the warm sunshine.
Cath and Bob took the lead while Tom and I followed on a few paces behind. The conversation soon turned to the events at our previous meeting. Tom said how much he had enjoyed it but wished it had been me wanking him off. I asked why and he said he had always fancied me and wanted to get into my tight little pussy.
"How do you know I have a tight pussy?" I queried, already guessing the answer. His reply, of course, was that Bob had told him.
"Do you often talk about me and my tight pussy?" I asked "and what about Cath?"
"Oh we talk about her as well, her big tits and her shaved pussy."
"She shaves her pussy? I asked. This was highly unusual in those days and it made me think.