I have been an exhibitionist ever since I first began to masturbate. I am now 33 and always looking for new ways to satisfy my urges. There is no satisfaction in simply flashing; what I am after is some sort of reciprocal reaction from my target. This is how I came into contact with my 58 year old mother-in-law. Although I live in the UK I am married to a beautiful (and very naughty French girl) and we are close to my in-laws, particularly after the birth of our two children. My in-laws live in the South of France and we do not get to see them very often. As a result we have begun to take our summer holidays with them so that they can spend time with the grandchildren. Being the South of France it is often very warm when we are staying with them and my wife and I often sleep naked. When we first had small children they would sleep in the room with us but as they have grown older they are now in their own rooms at the end of the corridor. So that we can hear them at night we have developed the habit of leaving our bedroom door open. My in-laws are very generous to us and allow us to lie-in in the mornings and so they take care of the children at breakfast. I noticed one of my in-laws would quietly close our bedroom door so that the noise of children would not disturb us. At first I began by appearing to sleep face down, having kicked of the sheets as if I were too hot during the night. The first time I did this my mother-in-law took rather longer than usual to close the door, as she stood staring at my arse. As an experienced flasher I knew that I had to take matter slowly…..so over a number of holidays, and as a function of the temperature, I began to show more and more flesh. I progressed to the point of lying on my back with only a small area of sheet to cover my groin. My wife and I have an active sex life and we both enjoy oral sex, as consequence we are both closely shaved. My father-in-law, on the other hand is the hirsute type with the typical hairy chest, arms and legs. Now, my mother-in-law is an old fashioned, well brought up girl and has only ever been with one man, so I suspect she has always been rather intrigued by my hairlessness (I am not the hairy type at all). As I progressively pulled the sheet up my leg each morning my Mother-in-law seemed transfixed by my smooth belly and legs…..she was taking longer and longer to close the door. On a few occasions my father-in-law would close the door and often they would both be there, partially closing the door and sneaking a peek! On one particularly balmy evening we finished a heavy meal and all staggered off to bed complaining we would sleep badly due to the heat and slow digestions……I took this as my complain that I would probably toss and turn all night and need a longer lie-in; everybody laughed. I managed to wake early and creep to the toilet to empty my bladder…..I had a plan and I needed to make sure I did not need a pee at an inopportune moment. Regular as clockwork I heard my in-laws begin to move about…..I positioned myself on my back to make sure my nakedness was completely visible and slow caressed myself to the hardest erection I had had for a long time….today it was my father-in-law that came to close the door (I am not shy and as a flasher you have to be prepared to improvise so I did not move….if I had rolled over suddenly that might have alerted my in-laws into suspecting I was not really asleep), he stood transfixed for a full minute before slowly retreating…..sure enough seconds later he was back with my mother-in-law. They carefully pulled the door partially closed and continued for some minutes to admire my throbbing knob. They then closed the door. Wow….what a great flash! But then things got even better….I could hear my in-laws have frantic and rapid sex on the other side of the wall! Seeing my early morning hard on had so excited them they could not resist having a quick fuck! *** Events progressed. My in-laws are now used to seeing me naked, shaved and hard in the morning…..I have even had discussions with my mother-in-law where I talked about having hot flushes in the night and kicking off my sheets….and she made a slight slip once, as my little boy Jonny ran around the garden naked and my wife said “Oh, for goodness sake put some clothes on!”, my mother-in-law had a slip of the tongue and said “oh, we are used to seeing Robert (that’s me) naked”……my wife and I appeared not to notice… *** And events continue to progress. My son has started tennis lessons whilst on holiday but these start quite early so it was agreed my in-laws would wake us up so that we could take our son. The first morning this happened I realised, too late, that my mother-in-law intended to wake only me and not my wife. To do so she had to come right into the room and whisper in my ear….as I had expected my wife to be woken as well I had not opted for the full flash but only had my arse hanging out and was lying down face first. The second day I realised I had a new opportunity and ensured I was lying on my back….I heard my mother-in-law approaching down the corridor….she stopped a at the door to admire the view as usual, but this time turned on the hall light for even better visibility….she then walked into the room and up to the side of the bed…..she did not speak immediately but continued to admire my full on shaved erection, that now started to have pre-cum oozing from the knob in excitement…..she whispered my name…..I stirred slightly……she whispered my name again and placed her hand on my bear shoulder…..I gave a little start and convulsively grabbed my hard on and stretched, yawning…..my mother-in-law muttered something about not catching cold and reached out to draw the sheet over my naked body…..as she did so her hand fluttered briefly across my hot shaft…..FUCK, I nearly came on the spot…… More to cum!