nude swimming and extra sex

in the 1990s my late wife and I lived in tropical South America in a house with a substantial private garden and pool. We were expatriates and members of several expat clubs and local groups. 

We often swam in the evenings and daytime at weekends and after the first month we realised we could swim naked and enjoyed the wonderful freedom of costumeless swimming. We felt restricted when we had visitors and wore costumes in the pool. We went to poolside barbecues and hosted them at home. Occasionally women would swim topless but noone was naked. 

My wife regularly met several other women for lunch and one night , in bed, she said , flirtatiously, that after a glass or 2 of wine the women started to talk about nude swimming parties and sex with other men. I asked her if she joined in this conversation and she said , yes, of course,".This started to make me hard so she asked if I ever had such fantasies to which I replied "of course " and we then made love joyfully. 

We returned to this topic a few days later when she said she had invited Sally and Bjorn for a barbecue on Saturday so we fantasised about swimming naked with them and what it would be like to fuck someone else . We had both had several sexual partners before marrying 10 years previously but had never even thought of straying in that time but we decided we could try it without affecting our relationship.

My wife said that Sally was ready to try, too, and would encourage her partner. 

On Saturday they came round and we went to the pool area for a barbecue  all sensing a charged atmosphere. After the barbecue, and a few glasses of wine, we laid out the poolside loungers and inflatable beds. I said that I was going to swim and fuelled by the wine just stripped off and jumped in. I looked back and saw my wife, Carol, and Sally were topless and ready to come in too. Bjorn looked hesitant but Sally grabbed his shorts and pulled them down exposing a good sized cock growing rapidly. By this time Carol was naked and climbing into the pool followed by Sally who took her bikini  bottoms off in the pool. 

Bjorn appeared transfixed by the sight of Carol swimming on her back exposing her pubic mound to the world. She had shaved all of her pubic hair which was almost unknown at that time - this was before the internet and widespread access to porn - and he had never seen anything like that as Sally had the full bush, or at least I assumed so as I still had not seen her totally naked. 

My wife, who was rather mischievous, sensed his fascination  swam over to where he was still standing on the poolside. By this time, Sally was swimming on her back and I could see that she still had an untrimmed bush of fine hairs. Bjorn was getting a real erection by now so he dived into the pool. My wife looked over towards me and we both nodded to each other. Consent to go further given.

I caught up with Sally and put my hands on her breasts which were quite large and she kissed me and said she was ready for anything. My wife climbed out and sat on the side of the pool with her legs slightly open revealing her shaven cunt. Bjorn could not hold back so climbed out of the pool with a full erection which Carol took into her hand and led him to an inflatable bed, pushed him down onto it and lowered herself onto his massively erect cock. She obviously was very excited and was so wet that she had no problem taking his cock.

Seeing all this happening Sally said we could fuck in the pool which made me even harder than I had become watching Carol. She turned into me, opened her legs and my cock found her entrance so easily. She pushed down so I slid in.  She must have been internally very wet to let me in so easily in the pool. Her nipples were hard against my chest and we just rhythmically fucked, my hands on her bottom pulling her on. We were so intent on fucking that we did not see the other pair change to a normal missionary position until we heard a lot of noise as Bjorn came having pulled out of Carol. She was kissing his cock and fingering her clit and came as well. I could feel myself about to come, helped by the buoyancy of my balls in the water and had a wonderful ejaculation. I came into Sally, as having had a vasectomy it was safe to so do. I pulled out and saw sperm coagulating in the water as I finished Sally to orgasm with my fingers. 

We reassembled in our original couples and had another glass of wine and lay quietly thinking about what we had just done. Carol and I were content, so was Sally but Bjorn was unsure of himself . 

We did not talk about it at all until our visitors had gone. Then we flirtatiously discussed our new fucks . This made us horny so we made love . Carol said she had enjoyed giving way to pure lust but this was much better. I agreed.