It started a few years ago when we had our first child, Jill my mother in law came to stay and help out with the new baby, Jill then was in her early fifties, good figure with nice big tits and not a bad looking woman but we just didn't get on. She had the spare room , one evening she ran herself a bath and went upstairs to have it, my wife was in our bedroom as she had a cesarian so was confined to bed for a few days. As I cam out of our bedroom Jill came out of the bathroom completely naked ! I noticed she had bigger tits than I ever thought not very saggy but a really great shape and a thin covering of hair on her pussy, I could clearly see the shape of her slit and could see a parting of her pussy lips, it immediately made me aroused, she made no attempt to hide anything , in fact she stoped only for a few seconds so I could take in the view. And what a lovely view it was , she never mentioned it and I had quite a few wanks thinking of that body. I always thought it would be great to see that pussy shaved and play with those large tits. Fast forward 10 years and unfortunately my father in law passed away so Jill was on her own, up until then we still didn't really get on but my wife asked me to make one more effort, so I started to do a few things for her, shopping a bit of DIY etc ,i spent a bit more time there but she still never mentioned the day I saw her naked. I noticed that over the few months I was going there she definitely was getting a lot friendlier than she had ever been, the odd touch, my arm, my shoulder etc and I definitely felt a lot more at ease with her. One day I was thinking about when I saw her naked and it made me really horny and I was meant to be going over to help her out with some things in the house, I don't know why but I took some things from our house in a bag , a couple of dildos and a razor and shaving foam and a camera. When I got there she was pleased to see me, after a while of the usual chit chat I said to her that I was going to look after her in every way, she asked me what I meant and looked puzzled !! I said she needed to get out a bit more, I told her she was still a good looking woman with a great figure and she should dress up a bit and got out, it was then she mentioned the time that I saw her naked , asking if I had enjoyed seeing her to which I replied of course, I told her that she had an amazing body and that I could close my eyes and still picture it. She sat next to me touched my arm and said she wouldn't know what to do without my help over the last few months, I felt like chancing my arm a bit so I said do you trust me ? she replied of course, so I said go up and have a bath and put a robe on when you have finished , she looked a bit uneasy about it but said ok but I must stay downstairs. So off she went for a bath, while she was in there I went upstairs to my wifes old room and took the bag and left it by the bed, when Jill had finished her bath she came down and sat on the sofa, I said I wouldn't try anything but wanted her to follow me upstairs, so there I was walking upstairs with my 63 yearly mother in law following me, my head was racing, my heart pounding and my cock twitching, I sat her on the edge of the bed and I sat next to her, I said about the time I saw her naked and how much it turned me on, she said at the time it turned her on swell, I mentioned I saw her pussy covered in a thin layer of hair and that I had always wanted to see her pussy shaved, she looked at me and smiled and just laid back gently on the bed, I gently moved my hand to the belt on her dressing gown, I gently pullet at it, her dressing gown was now just laying on her, I slowly started to move it, exposing her legs then her pussy, she slowly parted her legs ,it was so horny, seeing my mother in law opening her legs and showing me her lovely pussy. I didn't dare touch her incase she didn't like it, she reassured me it was OK so I very slowly touched her clit, she immediately let out a small moan, I started to insert a finger into her, she was so wet ! She pushed my hand away and she asked me if I wanted to shave her so of course I said yes, I quickly put some foam on her pussy got my razor and carefully shaver her, she went into the bathroom and washed it all off.When she returned she said it felt different , more sensitive, she laid back where she was before and opened the dressing gown herself, opening her legs and asking me what I thought, it looked so lovely not a hair in sight, slightly open pussy lips glistening, my cock was so hard ! I moved onto the floor and started to position my head between her legs, I started to lick her pussy, she was moaning, I stuck one then two fingers in her cunt moving them faster and faster, licking her clit at the same time, I opened the bag and got out a dildo, one my wife had used on so many occasions about to be rammed into her mums cunt, I slowly inserted it into her then getting faster and faster fucking her then she let out an almighty cry and squirted from her pussy over the dildo, she was shaking and moaning , I stood up and dropped my shorts, my cock sprang out ,it was rock hard, she slowly wanked me and then bent down putting my cock in her mouth, she sucked cock so good, I know where her daughter got it from, I didn't want to cum so I moved in between her legs, rubbing my cock up and down her slit and slowly eased it inside her, all the way in, fucking her harder as my balls slapped against her arse. I had her legs right up like when I fuck her daughter she was making so much noise, I knew I couldn't last long and spurted a load of spunk deep inside her pussy, she was coming, moaning and so much pussy juice on my cock. I pulled out and reached into the bag and got the camera, I took a pic of her wide open pussy as my cum started to run out, she asked me to lay down next to her, we rested for a bit then she sucked me hard again, this time she got on top, completely naked, riding my cock as her tits moved about, they were a little more saggy than when I saw them a few years ago but still a lovely big pair of tits, she rode me for a few minuted coming as I squirted another load inside her. She said now she understood why her daughter had married me, she asked me if we could do it on a regular basis , so now I go round once week sometimes more, I've fucked her loads of times now and she gives the best blowjobs and swallows the lot, made a few videos and taken lots of pics of my mother in law, she loves being fucked but said she wasn't like that with her husband, I've suggested that I take her to a swingers club and we have fun with couples, she's a bit unsure at the moment but im sure she will come round, funny thing is I do the exact same with her daughter, we've ben to a few swingers clubs and a few parties, now to take my mother in law !!!