First Time Wife Shared With A Friend: Erotic Camping Trip

This experience happened during a camping trip with Steve, an old friend of mine that had recently split up with his wife of 17 years. Apparently his wife had been having an affair with someone in her office. Steve was 48 at the time, fit and good looking for his age, loved all kinds of outdoor activities and had a passion for camping. Allison and myself had never been camping before and had booked a holiday with them several months before their break up.
I'm Callum, 29 and been married to my beautiful 23 year old wife Allison for 4 years and when I met and married Allison, Steve was our best man. So when the day arrived, we all drove down to Ashburton in his car and when we went to book in at the campsite, were told that our booking had been cancelled and refunded. It turned out that his wife had booked the holiday on her credit card and after they'd split up a month previously, cancelled the booking to get her money back.
The campsite owner knew Steve quite well and although all the large 4 berth tents were fully booked, he said all he had left was a small 2 - 3 berth tent. Although Steve was quite put out, he apologized to us profusely and as we told him it was no problem, he accepted the campsite owners offer. However, when we saw how small it was, we couldn't believe it.!The story starts in the tent and also involves dogging on the way to a sexy swinger / fetish club and the last chapter is the grand finale of what happened at the After Party with Eleanor and Charles.
WarningThis story contains 18 + adult themes