This happened years ago long before I met Lisa. I was in a vanilla relationship but thinking about more. I will call the other couple Adam and Eve.

Lin and I were living together, Adam was her partner at work and they worked shifts, so they were out together some nights. His wife was Eve. We went to their house and they came to our house for dinner every month or so.

When we met I got a kiss on the cheek from Eve and we would spend some time chatting and playing board games while the cooking was happening. I would go into the kitchen to help Eve cook. There was always wine flowing before,  with and after dinner.

There was a little  chemistry going between Eve and myself and I did think about bedding her often.

One evening we were invited to stay over. We agreed. There was more wine than usual and we were getting liberal. So touching,  nothing actually sexual but more than we had done before. 

On the way to bed I thought we were going to swap but Lin pulled me into the spare room. There were tissues and wet wipes on the side of the bed, no lube but we were young.

Sometime in the night they were at it, the bed was banging the wall.

It is so long ago I don't remember if I was thinking of Eve being fucked, or what I was thinking. I do remember that I rolled onto Lin and fucked her, making sure the bed hit the wall. How I managed it with so much booze in me I don't know, but I did.

Lin did what she always did. Handed me a tissue to hold my cock with as I pulled out and took two for herself to stop any leaks.

In the morning we had breakfast and walked home. 

Half way home out of nowhere she said. “I'm not going to bed with Adam so you can have Eve.”

That was the end of any foursome. 

I'm not sure how long after it was but Lin and Adam were on nights when I had a call.

“Do you have any aspirin?” Eve asked.

“Yes I do.”

“I will be over.”

Eve came in giving me the normal kiss on the cheek, sat down while I got the aspirin. 

“Would you like a drink with that?”

“No, I am OK.” She put the aspirin in her purse.

“Have you ever had halvar?”

“No.”

“We brought some back from Cyprus. I'll get some for you.”

I opened a container and pushed the spoon in. I offered the spoon to her mouth. 

“Is this what you and Lin do?” She asked. 

“No, do you want to do what Lin does.” I pushed a bit too fast?

Barbara stood up, I thought she was going, I stood up and we looked into each other's eyes. There was a moment, then she kissed my cheek, her hug was closer than normal and her hands moved. I moved to kiss her on the lips, her arms tightened. I pulled her close so that she would feel my hard cock.

Any worries that we may have had dissolved. Things warmed up quickly. My trousers dropped and her pants came off. There was no question of condoms. She ended up laying on the sofa, her blouse was loose, the front of her skirt pulled up to expose her but I never looked. I buried my cock in her. Her kisses increased and her hands pulled me into her. 

Her still covered breasts heaved, what skin I could feel was hot. Her pussy was hotter. She was panting, I was breathing heavily and she let out a deep moan before I filled her.

That was when things changed again. She cooled, pushed me back. I sat on the end of the sofa pulling up my trousers as she straightened herself. 

“I better go.” She told me.

I closed the door behind her wondering what we had done and what it meant.

The next few times we met there was no kiss on the cheek,  but later we returned to that simple gesture. We never did it again, I'm glad we did but wish we had continued.

Adam was posted a few years later, I still get a Christmas card, which is what reminded me of the one time we fucked.