This began rather oddly. My wife Liz had been out with some friends and at the end of the night as she returned home walking with two other friends, they passed a street light which was out, 'Look out for a bloke in a mac' said one. Liz asked what she meant and was told that a man had been flashing on a Wednesday every week since January, even when it was freezing, the joke there being that the lass who had been flashed said she needed a magnifying glass that night. That caused a titter or two and then she was told that Fliss (Felicity) had seen him three times in five weeks, he had just appeared round a corner and opened his coat and wanking his cock before moving away quickly. It had been a reasonably frequent story with the girls for quite a while and at least three women had seen him, all saying he looked quite respectable and not scary even though the deed could easily upset someone younger, he seemed to target older ladies rather than girls under thirty. When she arrived home, she told me all about it, saying she never gets any luck like that. I perked up at that and said maybe she should go and find out for herself. She said it made her feel horny, thinking a guy would flash to a stranger. I said that all the girls seem to think he was quite harmless so let's discuss it further in bed. That is the place we like to lie and talk about sexual matters, it seems a place we can talk more easily and digest information better than if a television is on or a laptop is being studied or used for ordering online goods. I began by saying I would cover her if she felt she needed any support. We got a bit excited as I made up a story which she always loves me to tell her, me suggesting what might happen if she went along to the flashing place, (a part of the river in town where there is a large bend and a way under the bridge to open fields). My story went along the lines of him flashing and eventually her being that turned on that she fucks him, by which time my fingers and the sheets were soaking and she was trembling with tension as she came. I was confident now that she would undertake a visit and as I shagged her, I told her she was going to be a lucky naughty girl. As I came I said it was a dare from me, her challenge to do something she had not experienced before. Next day I was working and she sent me a text saying Fliss had called in and admitted he was quite tall and about forty years old. He had never spoken to her each of the three times she had encountered him, just opened his coat and wanked a nicely proportioned cock, smiled in a friendly way and then covered up and moved away quickly. I reminded her that tonight was Wednesday and if she wanted to go, then we needed to be in town around eight so she could have a drink for courage and then we could get where he would be, all things being normal. Apparently he is not seen if a third party is anywhere close. Fliss uses the towpath regularly and each time she had got lucky there was never anyone in sight, but that she saw him two weeks running. I got home around half five and evening meal was ready. I was told I must remain downstairs and not to go up. She was choosing her attire for the night. It had rained a bit in the day so I was only fifty per cent happy that he would turn up. I waited, chewing the fat of what was to come, heard the bath water running away. I was already to go, dressed in jeans and tee shirt with a fleece in case it got wet. She came down just after eight and looked great, make up on obviously in stockings, but she refused to open her mac to show what dress she had on. 'You will see soon enough was the only clue I got. Her boots intrigued me, but knowing it was a towpath, stilletos were not de riguer. We drove to a pub on the riverside. Typical midweek, empty. Sat in a corner while I had lemonade and she a G&T or two. It was beginning to get to dusk, the sun was down and the skies were losing their brilliance. I suggested it was time and she said, for me to get the car while I am at the loo. I pulled up at the door and she got in with a slightly anxious look on her face. 'You OK' I asked. She looked at me and smiled and said 'Hope the bugger turns up after all this'. I suggested she timed me by about two minutes and then follow me as he often flashed under the bridge. I set off and we soon got to the side of the bridge where a small clump of trees stood barring access to the riverside, the bridge to our right and the towpath running underneath the roadway. All was quiet. I said I would set off, gave her the keys which she put in her pocket and set off. I got on the path facing the fields away from town and strode out as if walking with purpose, that way I could walk faster without looking out of place. I had gone around five hundred yards and not seen anyone. I walked slower and felt my stomach throwing somersaults as I considered what was possibly happening right at that moment. My curiosity won and I found myself turning back towards the bridge which seemed a long way off. As I neared the big bend I could see the bridge closer, and then suddenly I could see under the bridge and two figures fairly close to each other. I froze and strained my eyes in the fading light but recognised Liz'd coat and that of a man, dark blue as described. Heart beat started slamming into my ribcage. Just what was happening. They were talking. I slowly walked forwards, thankful that I was wearing soft shoes and making no noise. I was around thirty to forty metres away when I realised Liz's coat was open, the man had his back to me so I could just presume he was showing himself off, my best reason being that I could see her head angled down a little and her arm extended as if she could be stroking his cock. By shifting into some bushes growing on the bank, I could see his hand was also extended towards her open coat. I noticed amid heightening tension that he was actually fingering her and she was wanking him. Suddenly they both covered up and a few seconds later a guy walking his dog appeared coming towards them. That finished the meeting and they broke away. I remained where I was until the dog walker was past me, then made my way towards our car. As I neared the corner of the bridge something made me be cautious, both Liz and the guy had gone in the same direction so might still be having fun. However, yes they were up the slope but he was walking away and Liz was sitting in the car. I walked past gesturing she pick me up round the corner. Nodding, I heard her starting the engine. I turned right into a side street and saw the flasher walking quickly away on the opposite side of the world. Once back in the car, swapping driving positions she opened her coat and grinned at me, suspenders holding up black stockings, my favourite and something beyond my imagination that she would do solo and meeting a flasher and wanking his cock was going to make us explode. Other people were about so we drove home and went straight to bed. I fucked her in a frenzy as she told me how fabulous and unusual it was. Almost surreal at first as he flashed her and she returned the favour. Looking like gunslingers, but using the sexual attraction as guns, they spoke and Liz had told him she was impressed. He returned the favour and she invited him to touch which he did with gentle touches of her naked breasts and nipples and then her cunt which he fingered carefully but expertly. As I rolled off her, having exhausted myself on her, leaving my spunk dribbling sexily from her, I said it was a pity she did not get any further. She whispered that she had his phone number which she had copied down to her phone. She picked it up and showed me. I might ring him tomorrow, she told me. I wonder if she will. If she does I will tell you all