I married my wife when I was 26 and she was 27. We have a lot of good times and a decent marriage. Like a lot of guys though, my mind has a tendency to be a bit deviant and I spend a lot of time thinking about being with women that I really shouldn't. I have never cared for my mother in law. She is a pompous, pious bitch who knows everything and loves to try and talk down to me. After a couple of years of marriage, I found myself hating her but also drawn to fantasizing about being intimate with her. I found myself making excuses to be around her even when we were arguing. Two months ago the entire family was at a family friends wedding. I was super bored and noticed that for once the old bitch was actually pretty loosened up, and getting a pretty good buzz on. I started hovering and refilling her wine glass and ensuring that she was very tipsy but still wasn't sure what it was I wanted to accomplish. An hour or so later she was too drunk to stand and was starting to pass out. As the sweet and thoughtful son in law I volunteered to drive her home and get her settled. Silly family actually thanked me. I had no idea what I was going to do, but was already rock hard with anticipation. We got her in the suv and reclined her seat so she could pass out. I started driving the 45 minutes back to her house and entertained myself by shoving my hand down her top and up her dress, playing with her titties and pussy the best that I could. When I got her home I woke her up enough so that she could stumble up the steps into the house and to her bed. When she started to pass back out I made my move, kissing her wine stinking mouth and shoved myself on top of her. She was in and out of consciousness, sometimes kissing back, mostly just laying there. I undid my suit pants and worked my cock into her mouth. Again she was passed out and would occasionally wake up enough to suck for a minute. I was so hot! After a few minutes of fucking her open mouth, I dropped down between her legs and hiked up her dress. I spit in her pussy and shoved my way in! So hot! Good thing I didn't have to impress anyone that night because I came in under two minutes! I was hard again almost instantly and fucked her old pussy for a while longer. This time when I came close to cumming, I pulled out and brought my cock to her open mouth. A few more strokes and then shot my load right in her mouth. This of all things woke her up! She stirred a bit, swallowed some, and spit the rest all over. I laughed so hard. She asked me what I was doing, and I said "Terry, you're the one who wanted me to fuck you" and laughed! She passed out again. I called my wife to see how much longer they were going to be and she said at least an hour. My cock got hard again. a little more spit and I was aiming right at her ass. I did make it a couple of awesome thrusts but apparently getting fucked in the ass had a sobering effect! Needless to say the next hour was spent pretending to be more drunk then I was and insisting that she forced herself on me and that we were both responsible. She was so upset, nearly inconsolable. I managed to work my cock back in her pussy and started gently fucking her. She begged me to stop and started weeping hysterically. I told her I couldn't stop, that I loved her and that it was perfect with her. She wouldn't stop crying and when I came inside of her she was begging me to finish and get off of her. Instead I stayed in and kissed her lips. I felt redeemed. The next day I did everything I could to be around her and try to kiss her, touch her etc. She told me it was a mistake and that we had to never speak of it again, and cried the entire next day. My wife keeps telling me how upset her mother seems lately, but I can't help feeling like I've finally made up for some of the awful ways she's treated me over the years. Afterall, shouldn't a bitch be treated like a bitch?