We stood still for a moment, drinking in the silence, and then I suggested that we watch the sunset from the top of the dune. Scrabbling up the slope we took two steps forward and one back in the loose, dry sand, and when we reached the crest I flattened out a small area for us to sit down on. As I casually put my arm round Estelle's shoulders she moved in to sit close up to me and hooked her own arm over my thigh, both of us pretending we weren't fully aware of her elbow, resting right up between my legs.

The sun gradually dropped to the horizon and as its edge touched the crest of a distant dune I told her to look for the green flash, and then had to explain just what that was all about. So OK, as usual we didn't see it and then the light faded rapidly from the sky, as it does in these latitudes, and within half an hour all the stars had come out, great sweeps of brilliant light scattered across the velvet blackness above us, many more than we can ever see under the bright illuminations of civilisation.

After a while Estelle stirred under my arm, looked up and whispered 'thank you, thank you Jim, I'll remember this for the rest of my life'. In the starlight I thought I could see tears of pleasure glinting in her eyes, and then I thought oh what the hell. I reached out my other hand to her face and leaned in towards her, slowly so as to give her plenty of opportunity to back off if she wanted to.

But she didn't want. Her hand went to the back of my neck, the slight but very obvious pressure giving me all the permission I needed to move right in, and then we were kissing. Soft, exploratory kisses, experimental, each of us wondering how far to take it but not wanting to push things, lips gently moving against lips and the occasional tip of one tongue or the other flicking out and back. Then I pulled away and said 'I've been wanting to do that ever since I first saw you', and she simply said 'I know' and we were back to kissing again.

And then it was her turn to pull away, and she asked me to go down to the airplane by myself and leave her up there on her own, and I half wondered if I had done the wrong thing. All I could say was 'OK', though I purposely made it sound like 'OK but why?' She caught the intonation in my voice and said 'Ever since I was a little girl I've tried to imagine what it must feel like, being all alone in the desert at night, naked under the stars, and imagining that I was the last human alive in the whole world, and this is the first opportunity I've had to live it'.

Well, she could have been making me an offer, but I didn't think she was, so I gave her a quick kiss, slipped and slid down the side of the dune and went and leaned up against the wing of the plane, my mind running wild with thoughts of what she might be doing, all alone up there in the starlight.

Fifteen minutes later she came back down the dune. As she walked out on to the flat I could just make out that she was carrying some kind of bundle, and I asked her what she had found. Putting it on the wing she said 'only my clothes' and as she did so I could see that all she was wearing were her briefs, the dark band across her hips contrasting with the lighter gleam of her body. Then she turned and walked the few feet up to me and I remember even now the way her full, free breasts swayed gently from side to side in time with her steps. She put her hands on my arms, and I automatically reached out with mine to the bare flesh of that gorgeous trim waist, just above her briefs. "Jim' she said 'right now I just feel like having a one night stand. I want a long slow fuck, with no questions and no commitment'.

I knew right away that this would be one of those occasions when I would be unable to think of an appropriate answer till tomorrow, so I didn't even try. I ran my hands down over her hips and then round to cup her bum and pulled her in to me, and she wrapped both arms right round my neck and now there was a lot more passion in our kisses. By this time my dick was standing firmly to attention in my shorts, and I pushed her belly from side to side against it so she could feel the effect she was having on me. She responded beautifully, moving her feet apart and pulling up on tiptoe so that she could press in even closer and rub herself hard against me.

A couple of minutes of this was working us both up, and then she whispered that I had too many clothes on. I backed off a little, drew my hands round and up underneath those full breasts and said that she had better deal with things herself as my hands were busy elsewhere. She giggled and did just that, and when I was down to just my briefs she came back in again, plastering her warm curvy body right up to me. With her mouth still hard against mine I turned her sideways and ran my free hand over her waist and then down to slide into her panties,rubbing a finger slowly up and down her clit and feeling her jerk and gasp as I did so. Then I began moving my fingers in and out of her wet warm pussy and she pushed herself hard against my hand, reaching with her own hand into my briefs to grip my erection and start to wank me.

We enjoyed finger-fucking each other for a while and then I couldn't wait any longer. I eased her briefs right down over her hips and they dropped to the ground, and when she stepped out of them I pulled her arms back up round my neck and wouldn't let her bring them down. Holding a completely naked woman in my arms while remaining partly clothed myself has always been a particular fantasy of mine.

Eventually I let Estelle strip off my briefs and then she used both hands to try and guide my rampant dick in between her legs, but the difference in our heights made it awkward to progress matters the way we both wanted. We really needed to be lying down together but the ground, while flat and smooth enough for a plane, was a lot rougher and sharper for bare bodies. I said 'come with me', took her by the hand and led her round the end of the wing and up into the cabin of the plane. Tilting one of the executive seats back till it was flat, I retracted the armrests, lay down full length on it and pulled her over on top of me, capturing her mouth and running my hands up and down over her warm curvy back and bum and hips, and enjoying the way her soft rounded body was wriggling against my own.

She spread her legs and slid one hand down between us to grasp my dick and held it in position with the tip just touching her wet lips, and then we both pulled together and I slid slowly and easily right up inside her gorgeous lubricated passage. And then it turned out to be neither a long fuck nor a slow one. After such an erotic build-up we weren't about to take things gently, and as I moved faster and faster in and out of her soft warm vagina she started grunting... unh ...unh...unh... deep in her throat in time with my thrusts. Her sounds gradually moved up the scale and by the time I realised that I couldn't hold back any longer and came she was just about there herself, gritting 'oh fuck, oh fuck' through clenched teeth, moving one hand down to massage her clit at the same time as finishing herself off against my cock while it still had enough firmness left.

Then we lay in each others' arms, getting our breath back and letting our heart rates return to normal. After a while I said I was sorry to be a party pooper, but the airfield would be shutting down as soon as the evening schedule arrived from Tripoli, and we had to be getting back. She whispered into my shoulder that she would rather stay out here all night, and I said I would too but if we didn't turn up there would be a missing aircraft alert and a search would start in the morning, and Dave would have to be told. So we dressed and got back into the plane, and i started it and warmed up the engines. I had a perfectly flat area two or three miles long and a mile wide in front of me, the white surface of the lake bed standing out so well in the bright starlight that I didn't even have to make use of the aircraft's powerful landing light for the take-off.

As we taxied in at Sebha we heard the Tripoli schedule make contact with the tower and then I shut everything down and we walked hand in hand back to the hotel in the warm starry night. I got a couple of drinks from the bar and we sat talking about the flying and the desert, and then a group of passengers from the schedule came in and the place got noisy. Estelle went for some more drinks and when she brought them back I thanked her for them. She said that it was she that had to thank me for everything, and when she emphasized the 'everything' with a sideways glance and a little grin I thought it worth pushing my luck again. 'Look, Estelle' I said ' when you said a one night stand did you mean the whole night or did you just mean up to now?' She laughed out loud, finished her drink and stood up abruptly, and before I could get up she leaned across the table and whispered so that no-one else could hear 'your room, in fifteen minutes'

I have changed the names of the three participants in this account for obvious reasons. Tripoli and Sebha are real locations and anyone with Google Earth on their computer can fly southwest out of Sebha for 75 miles to the small desert village of Murzuq (Google Earth call it Marzuq, but then they've never been there), and just beyond it are the long lines of dunes of the sand sea, exactly as I have described and just as I remember them. And the Twin Bonanza was a real plane too - radio callsign November 565 Mike Romeo. I wonder if after all these years it is still listed on the American register