We didn't arrive at the motorway services for a meet with a guy on the spur of the moment. My wife had always had an adventurous side and I had enjoyed sharing pics and chatting on line, phone sex and web cam . She had met a lady for drinks and gone back to her hotel for lesbian fun and we always found pushing boundaries rewarding. It was not a straight road and we had met complications like time wasters and inability to make arrangements because of family commitments and busy lives. My wife had also been conflicted about the issue but had become aware of my strong desire and persistent fantasy about sharing her with others. I had been online and discussed this with Mark, the white van man. He got it completely and liked the sexy pics I sent him. Wife stripping, wife sucking my cock etc. All the arrangements were made highly speculatively... baby sitters arranged... Mark on stand by(on the end of a mobile phone). Wife aware of a "plan" or potential arrangement but not committed.... After dropping the kids for their sleepover it was decision time. Wifey was dressed to thrill. nice make up... summer dress... just lacey knickers underneath. If she wasn't up for meeting Mark she was up for sucking my cock and a good fucking. I was driving .. I was breathless and tight chested as I broached the subject of where I should head off to. She was non committal but agreed to phone Mark. He was friendly and relaxed and explained that he had been on a run in his van and could meet us within the hour at the services. I was busting my zip when wifey agreed. We had had experience of time -wasters and I knew she would be fairly firm from that point on so I set off... The journey was a kind of ecstatic torture. My throat was thick and my voice was weird. Wifey as weird too. Her adventurous side was winning out and she was apprehensive but excited. She got my cock out as I drove and felt the throb and pulse that was an unmistakable sign that I was massively turned on. We talked about that and then she dropped her made up lips around my cock. We were going to check things out for kinky fun but she made clear she would back out if not happy. What a reasonable approach ... mmmm The tension in the car built and built as we pulled off the motorway I was having trouble concentrating on driving.. my dick was hurting in my pants and about to explode. Wifey was quiet and hard to gauge but I continued with the plan as she was not saying otherwise. Mark had parked his white van at the rear of the car park away from the building as agreed. He was stood in the driver door and I pulled alongside hidden by the van from the building. It was all in wifey's hands..... It was amazing when she hopped out and gave mark a hug. There were nervous laughs and greetings. Mark was very complimentary. I was sat in the car and wifey opened the rear door and mark got in the back.. wifey next to him... off we went. I adjusted the rear view mirror and saw that mark was not in the mod to be shy.. he smoothed up wifey's leg till I could see her lacey gusset between the seats.Wifey was sat on mark's left hand and his right hand was smothin her skirt up to expose her lushious lady bits. Wifey was not hanging around either. Mark had joggers on and she was straight into them , scooped out his cock and went straight down on it. we were barely out of the car park at this stage and I was checking it was ok with Mark to leave his van and head for some country lane. It was mid summer and the sun was just setting and the street lights had come on. I was in heaven. My pulse was throbbing in my ears and my cock was bursting. Wifey was well into our adventure and as soon as we left the glare of the services and were driving on an unlighted road she took her dress off completely.. I genuinely nearly crashed the car. I did not know of a good location but headed for a country location. I was watching as things got steamy in the back.. Wifey was in wild animal mode and Mark was impressed. It took maybe ten minutes to find a quite lane sheltered by hedges at the entrance to a field. I pulled up and was able to turn around and enjoy for the first time. Wife pounced on Mark and straddled him and bounced up and down on his cock. My cock needed sucking so I got out, opened the back door and she accepted my cock... our first spit roast. Next we changed ends with mark inside sitting down and wifey stood in the back door of the car with me doing her doggy. She was hot and wet like never before. Mark was enjoying the moment and squeezing her tits and groaning. It seemed to occur to all three of us at the same time that given the success of the meeting so far it was the perfect time for wife to get fucked in both holes.. she was the lead and seemed desperate to sample that delight while the opportunity presented. I stepped back and my cock came out of her cunt. She manhandled and dragged mark so that he was lying across the back seat of the car. then she pounced on his cock , straddled it and groaned as she went down on it. he was substantially wider than me,as promised, with a massive bell end that was swelling and harder by the second. she loved it. Mark was quite partial too. She then started organizing me. She will always be remembered by me looking at me over her shoulder with her lip stick smudged and pure lust on her face. She was totally in charge of two men and loving it. I had to step between mark,s open legs and pressed my cock against her bum hole as she had signaled. she shivered as her bum stretched and she was screaming in ecstasy as i inched in. I could feel my cock against mark's bell end as i entered.. it was like a giant knotch to rub my cock against. Three adults that had been in sexual anticipation all day then exploded in lust.... nice. It was very quiet in the car on the return journey- hardcore kinky sex with wife yum yum