Iv known my wife and her family for 30 years my wife and myself were both kids when we met and her mother was about 32, im now 40 and my mother in law is 60. She’s a fairly uptight self-centred person and we’ve never really got on and iv defiantly never fancied her although iv had the odd dream about her over the years, until recently that is. She not particularly good looking but not ugly either, she’s got a nice figure id say about size 10 and very small tits with a nice arse. Me and my wife moved house a few months back just one street over from her parents house and we’d get regular visits from the in-laws, who would just walk in as we never locked the back door during the day, they’d come and go as they liked two or three times a day. So one day im laying a new tiled floor in our kitchen and my mother in-law walks in wearing tight leggings and a jumper, the leggings left little to the imagination and from my position on the floor im face to face with her camel toe, at that moment it hit me I wanted to fuck her. I spent several days thinking about the site id seen and the effect it had had on me and was wondering what I could do to take things further with out getting a smack in the face from her. A few days later I was I an upstairs room and my mother in law appeared around the door asking for my wife, I never heard her come up the stairs and just replied my wife had gone shopping the mother in-law said ok good bye and left. This got me thinking that if I was clever enough I could use the coming and going to my advantage and maybe test the waters a bit. Now my house has 3 floors, 3 bedrooms on the top floor and 2 bedrooms and a bathroom on the 2nd floor. There’s an alleyway running between the 2 streets we live in and I can see it from my bedroom. So the plan was to wait until my wife went out one day then just watch and hope the mother in-law came around then I get undressed fast run to the bathroom and hope she walked up the stairs, then id open the door walk out naked as if id had a shower and walk straight into her. I quickly gave up on that idea as 1 she might have jumped back in shock and fallen down the stairs or 2 she’d just freak and turn away and that would be game over. I decided that I would wait until she came around then lie naked on my bed hoping she’d be her normal nosey self and look around to see who was in. It took about 3 months before the day finally came I saw her coming through the ally so I stripped and waited. After about 5 minutes I heard the stairs creek and the handle on my door turn, my hart was beating so fast I thought it was going to explode. I had my head turned away from the door so I could look at a mirror through half closed eyes and was wondering what she would do when so looked around the door. The door opened and in the mirror I could see her head appear, I wondered if she would quickly leave or stay and look. To my surprise she stayed and looked, so many thoughts were going through my head now I didn’t know what to think or do. Then something happened that I never expected but I wanted, she walked slightly into the room and stood there staring at me. After what seemed an age she moved into the room and came up to the bed, my cock was hard as rock and I hoped she just thought it was a guy thing and that I was dreaming. In the mirror I saw her slowly reach out and then I felt it the touch of her fingers on my cock, just a light touch and she quickly drew back her hand probably afraid id wake up. Then again I felt her touch but this time her fingers wrapped them self’s around me and held me in her soft warm grip, my mind was going mental now wondering what would happen next. I felt her slowly draw back my fore skin to expose my nob, which was dripping pre-cum, she pulled my skin up and down slowly a few times and then it happened. She leant forward taking to tip of my cock in her mouth and slowly licked it, how I never shot in her mouth there and then I don’t know but I managed to hold off. I had my cock in my mother in-laws mouth and she was giving me a blowjob whilst she thought I was sleeping I didn’t know weather to pretend to stay asleep or wake up and surprise her. The surprise was her all right I couldn’t hold on any longer and I came in her mouth this took her totally be surprise and she choked on my sperm as it ran from her mouth. That was the moment I decided to wake up, WHAT WHAT what’s going on I said trying to look surprised, she looked horrified knelt at my side with my cum running down her chin. Enjoy that did you I asked, she tried to mumble an excuse but was lost for words I got off the bed and stood in front of her with her still kneeling down and pushed my cock towards her and said don’t let me stop you. She stood up red faced and tried to straighten herself I ceased the moment pulled her towards me and kissed her tasting myself on her lips. I reached around and grabbed her arse and felt little resistance to my attention so I grabbed the waist of her skirt and slid it and myself to the floor. I pushed my face into the front on her panty covered crotch and pushed my tongue against her, I felt her hands go to my head but they never pushed me away they pulled my closer. I slid her panties down and buried my face in to her pussy reaching in with my tongue as deep as I could, she moaned loudly and pushed my head harder into her warm wet pussy. I pushed her back onto the bed and spread her legs inserting my finger into her as my tongue continued licking her clit and she soon came squirming on her finger and soaking my hand. My cock was rock hard again I was going to fuck her I moved up between her thighs and felt the warmth of her pussy against my nob. I could fell her lips parting as I pushed against her warm hole, then she said no this is wrong please stop it’s a mistake. To late I pushed and entered her my god it felt good everything she said went in one ear and out the other I was in heaven I was fucking her. She said no no once or twice which then turned to yes and moans of pleasure. It wasn’t long before I was filling her pussy with my cum, I pulled out and watched it run out of her puffy warm hole, I fingered her for I bit and tried to stick a finger up her ass but that’s where she stopped it. She got up went to the bathroom and left. This was about 2 months ago Im hoping one day this will happen again and not take so much planning. We’ve not spoken about it and have never been alone again but I get the feeling its going to happen.