Jason and Liz made a date to meet in our local woods, a place frequented mostly by dog walkers with a variety of footpaths trimmed three times each year. I knew the paths well and so did she. Entry was through a car park and the woodland was fairly flat and even being in the vale of York. On the day of their meeting I had a job to do early on but due to poor weather the night before, so it was put off to the next day. I discussed with Liz that I would possibly take a walk to the woods and take up a position where I might be able to see some of their fun. She was keen that I did not ruin things as she had not let Jason know I was in on the secret. It was a mere three days since he had his first fuck with her and had been hanging around ever since but as we had some work being done, any hopes of further sex had been on hold. I suggested a likely place where thick rhododendron bushes gave excellent cover about forty yards away from a fork in the paths most commonly used by dog walkers, very few of whom exercised their pets between mid morning and late afternoon. She knew which path I meant and agreed it was a very good spot as you could just make out the entrance so anyone entering would be seen easily and most dog walkers let their animals off at the kissing gate so an early warning system if necessary was available. What to wear came next and I said that stockings and suspenders seemed to go down well with jason so why not a button through summer dress or her short denim skirt which had a zip right down the front and the new white top which was crocheted with some very sexy holes and no bra. When finished she was in the denim with boots which looked really sexy with the white top. She said she looked dirty and cheap but I disagreed and her cheeky smile told me she knew she looked very fuckable. I set off in my car as my normal routine was not to rouse any suspicion and parked up near a shop then doubled back and rang Liz to say I was going towards the woods with an erection that would not behave. She told me Jason had rung just as I got in the car and they had arranged to meet at 10 at the path leading to the woods. It was only just after nine so I had a frustrating wait ahead. I met some dog walkers and exchanged greetings, stopping to talk to a few I knew then made my way in through the gate and headed towards my planned hiding place. The grass was trimmed and I was pleased the rhododendron s were still uncut as every so often they are slashed back to stop them overunning the woods and I had a vision of trying to hide behind a couple of stumps. Thankfully that was not the case. I had some pruners with me and I trimmed very lightly a few leaves to gain a better view of the clearing I hoped they would use. A large felled tree had a quirk in it offering a kind of reclining support. We had fucked here before and Liz knew what my mind's eye desired. I had spread a few branches around to help thicken the hiding spot from their approach, I felt like bear Gryhlls and smiled to myself and then took stock of the time and decided I would take a stroll towards the gate to check my disguise was good enough. All checked and I was happy, my clothes were dull and I was happy I would not be seen. My mobile sounded, the text said she was waiting for him at the path, it was just after ten. A couple of minutes passed and she sent an imoji, the purple devil, her sign that it was game on. I peered down the fields and saw two figures making their way up towards me, male and female close to each other, a woman in white with a denim skirt and a young man in jeans and tee shirt, they were walking slowly, stopped to kiss and cuddle, then arm in arm making their way ever closer to me. Part of me wanted to stay and watch but I knew I had to get to my destination. In my hiding place I suddenly felt very nervous, I was shaking, my breath was faltering, heart thumping, cock straining, balls tightening. Taking my cock out, I very gently wanked as I tried to regain some composure but it only partially worked. My eyes were glued on the entrance and at last they were there, talking, kissing and now groping each other. Her breasts were out from her top, he had his hands on both of them and he kissed and licked them, Liz lifting her arms to let him remove it leaving her now topless, I knew her nipples would now be erect but it was a detail I could not see. Her skirt was also unzipped and I could see her stocking tops plainly even from this distance. I saw her direct him onto the path. They looked around, I knew there were no dog walkers around but it seemed natural that with what was in mind, they would check. He took her discarded top from her and hung it from a tree branch then they continued towards where I was hiding. His hands were all over her breasts and they hardly took three steps without a pause for a grope or kiss, this was hugely erotic for me as I saw his hand also delve into her skirt and caress her waiting cunt lips. When they reached the tree Liz said 'This looks a good spot don't you think?' Jason now had her in his arms and his kiss was directed from her lips to her breasts and Liz sighed happily. He kept saying 'I love you' to her, making my cock twitch, this was bordering on infatuation but so sexy. Liz said 'Love you too, are you going to fuck me?' There was no answer, just a groan from him and a sigh from her. The skirt was dropped to the grass and his hands slid her panties down, then he stopped and stood back, looking at her cunt. 'You've shaved' he said. 'Yes I did it this morning for you, do you like it?' I was rather shocked, she was fully shaved and I got a glimpse, perfect and cock achingly erotic. She stripped his clothes, very quick, just a tee shirt and jeans, shoes kicked off and he was completely naked. I saw his hard cock and knew he was not going to last very long. He took her to the fallen tree and laid her back just as I had done last year, then went down on her, licking her shaven cunt as she encouraged him to make her come. Her neck was red with excitement, nipples extended, the dappled shade made it almost surreal but the sight meeting my eyes was so very dirty, I loved it. I saw them sucking and groping each other, got a great occasional view of her cunt before he plundered her gash with his uncut cock. They fucked missionary and doggy style then to please me, she had him sitting on the tree and slipped his cock inside her reverse cowgirl facing me in my hidey hole. They kept fucking for ages making me wonder if he had already spunked in her but apparantly not as he had her standing up, feet apart as he frigged her to make her gush. This brought on an unstoppable wail of enjoyment from her as she trembled and shot spurts of come onto the grass and down her stockings. She kept shaking, holding on to him until she finished, her smooth cunt was shining in the sun, her thighs streaked and her body limp. He lay her on the grass and entered her again, fucking her deep until i saw his arse clench and with a few grunts of satisfaction they were finished, his come leaking from her used cunt as they parted laying naked and exhausted on the grass in front of me. I had come and now had a tell tale stain on my trousers. I quietly wiped myself and waited for normality to return to their brains. After a couple of minutes they started kissing again then a sound brought them to their senses, a dog walker was entering the woods. They quickly scrambled into their clothes and he ran to get her top. They were disheveled and red faced, her hair messed up and the signs were obvious what had occurred. The dog walker took the normal trail away from them, oblivious to what had been happening minutes before. I noted the come stains on her boots, spunk and her own sexy juices streaked across her stockings. The dog walker gone, they kissed again and he suggested they go to his parents house for some more sex. She nodded her head and said they ought to walk home separately to avert any suspicion. I hung around taking in the incredible scene I had witnessed, then waited until they had got half way down the path before breaking cover just as the dog walker was coming back down the track. I moved on after waving to him and followed my wife and her young lover back towards civilisation and a date with a shaven cunt later that day. I got back home an hour or so later. She had left me a note saying she hoped I had enjoyed the show and she would be back after dark and to keep an eye on Jason's window as she intended he leave the curtains open. I got a few glimpses of her as they moved around the room, one or two fully naked moments, her obviously going down on him and a vice versa as he licked her cunt but it was only a pale effort after the woods. She came back home just after midnight and gave me a kiss and a blow job, I licked her cunt and tasted his cum. She said he wanted her to spend the night with her but she said she had to get back home. I said that maybe she should tell him I knew what they had done and then she could stop over the next night if she wanted. We cuddled and screwed the next morning before I went to work with the events of twenty four hours previous etched deep in my mind. I was a very satisfied man especially as she said he was a very considerate lover and he knew how to use his cock. I reminded her to enjoy it while she could but remind him she was married and the love part was merely a part of being friendly and it would remain a no strings attached affair as she and I were very happy, me because i love her having sex with different men, it was what got us together all those years ago.