I was living with my girlfriend at the time, she was 20 and I was a bit, well a lot older. We had done all the usuall sexy stuff, in the car outside naked,she had riden topless on the motorway and through town on one mad occasion, we had been naked on slapton sands on a Devon holiday. In act anything to get an extra thrill without involving any one else. Neither of us wanted this We then started to do a bit of glamour photography, underwear,topless,but nothinghard core, she would not have liked that and would not go for it. But to spice it up a bit we began to do some shots outside on the moors in Yorkshire, we found a place where people left cars so that they could go walking and we used these cars as background to set up pretend hitch hiking and slowly stripping to attract drivers to give her a lift, usually ending up in only her stockings suspenders and shoes. then running back to our car for a great fuck. However on this occasion when we arrived we found the usuall few cars but also a motor bike and the lad who was the rider, she was well put off and wanted to go back home but I suggested we could use the bike as a prop if he agreed but not go too far with removing clothes if she was uncomfortable at any stage. she was very doubtfull but agreed to give it a try. So I told the lad we were going to do a few tame glamour shots and could we use his bike as a prop,of course he agreed. We started with her stood by the bike posing and pouting, then trying to sit on it but finding her skirt too tight to get her leg over,therefore off came the skirt, then a few shots sat on the saddle in thin blouse white panties suspenders stockings and heels. she was leaning forward with her hands on the bars and enough buttons undone to show plenty of cleavage and bra. When I suggested it she sat up and removed the blouse and I took a few more leaning forward etc. when i asked for the bra to be removed she said,not in front of him. He was looking a bit worked up and red faced but he said dont mind me I am just enjoying myself you are safe with me. I could see the way things were with her so I said go back to the car take it off and put the blouse back on and we will see how things go. When she came back her breasts were visible under the blouse and her nipples were long and hard she had also left a few buttons undone. I progressed with the photos until leaning forward again one breast came out and this made a very erotic shot, might as well get rid of it alltogether now I said you have been seen topless many times before, so she pulled her tongue at me and threw the blouse away. The lad was now in a right state I could see his erection in his jeans as he looked at her sat astride his bike stockings ,suspenders,heels hooked round the foot rests and bare breasts with hard long nipples just begging to be sucked. Right Isaid thats been a good session lets call it quits for today and thanks for the use of you bike. Just hang on he said I would like a favour back and talking to her he said you have the most fantastic body I have ever seen, you are so pretty, I will remember you for ever but just for me and the use of the bike will you do a few more photos for me with a bare bottom. Now had he said show me you arse or I want to see your cunt she would have gone back to the car,but as it was she looked at me and I nodded. She just slipped out of her panties and stood with her back to us posed by the bike ,she looked so sexy then he said just a few more on the bike so she threw her leg over the saddle and leaned forward on the bars and again he said can you stand up on the pillion pegs and lean realy forward so your nipples just reach the petrol tank. As she did this from the back her legs were wide and her pussy lips were parted. I could not resist I pushed a finger in and she pushed back at me at the same time he had pulled a very respectable erection out and was wanking for all he was worth. after they had both cum it was embarrasing as we tieded ourselves up and left. We have had penty of good shags at the memory of this but have never done any thing like it since.