My mother in law Susan is the dirtiest, horniest slut I've ever known and I can't get enough of her disgustingly perverse ways.

At first when my wife asked me if I'd stay over at her moms during my self imposed leave from work, I genuinely thought it was to help her get her house sorted. My wife was going to be working away for nearly a fortnight on a very important deal, and she hinted it would be a good way of me to finally to get to know her mom properly.

Susan is a youthful, really good looking and very fit woman, and had Crystal, my wife at the age of only sixteen. Crystal is now twenty two. Before we married early in the spring this year, I'd hardly met her mom as Crystal lived with her dad, who is divorced from Susan. So Crystal kept on suggesting it would be a great way of me getting to know her mom and also to help her out in her new house.

The first night I stayed was pretty normal, except the clothing Susan chose to wear to relax in as we settled down after dinner. It wasn't hard to miss her large breasts in her tight cut top, and also I could clearly see as she sat opposite me on her sofa, her pussy lips in the pair of super small panties under her little mini skirt.

I just couldn't help myself from looking and I soon had a raging boner, which I tried to hide with a cushion. The next morning after an uncomfortable evening, we got stuck into the work she needed doing. Around midday Susan took a phone call from Crystal and immediately afterwards asked me to help her in her bedroom. By the time I joined her after washing my hands, Susan was on her bed, lying down naked on her back with her legs spread wide. She had a vibrantly multi coloured dildo shoved deep up her very engorged pussy, and was fucking herself with it.

I went to leave thinking I'd mis heard her and feeling very embarrassed, but Susan called me back. She took out the dildo as I turned back around and told me to replace it with my tongue. I had two choices, carry on walking away or do as I was asked.

As much as I could lick, suck, finger fuck, fist and anally abuse her with the dildo, as I sucked on her swollen clit, Susan had me doing it to her. I'm not overstating how much this woman could and wanted to take. She quite litterally wore out my tongue and jaw, making me eat out her pussy and ass. Only when she'd climaxed four or five times did she eventually let up and have me take out my super hard throbbing cock.

Crystal is good at giving head, real good, but her moms mouth and tongue worshipped my cock, balls and asshole as though it was the last thing she was ever going to be doing. I'd never had anyone give me the oral sex she gave me during that lunch time and into the afternoon and I'd never had anyone ever finger fuck my ass as they sucked all eight inches of my cock deep down their throats. When I came for the first time, Susan was double finger fucking me and sucking so hard on my dick, my cum flooded her throat in hot spurting thrusts.

I didn't even get time to recover before she made me lay back and then mounted my face with her pussy as she held onto the head board. Once again I began to lick her large labias and engorged clit. Not satisfied she told me to fuck her ass with a didlo. As Susan put it "to get it ready for your cock". It wasn't the same dildo as before, it was a shiny black heavilly veined dildo, about the same size as my own dick. I was ramming the dildo in and out of her ass, at the same time tonging her pussy and clit, Susan moaning loudly and bucking all over the place. Then for the first time in my life a woman squirted all over my face, when Susan orgasmed hard. Her pussy juices soaking my face, neck and chest.

Keeping her "happy" I hadn't noticed my own cock was raging again. With her pussy cream all over my face she moved her body down until her asshole was touching the tip of my cock, bent down, licked my face clean and then we had our first kiss. With our tongues fighting each others, I felt Susans asshole envelop my cock as she impaled herself onto me. It was a defining moment for me, Crystal "didn't" like anal sex, but Susan was a whore for it. She fucked me, not the other way around. For over ten minutes and two orgasms later she rode my cock, getting me to the point of cumming then letting me relax, only to fuck me harder and faster the next time, driving her well fucked ass up and down my cock shaft in increasingly longer strokes.

I didn't think I could cum as heavilly as I had previously, but I was wrong. I was totally turned on watching her large tits bounce up and down in front of me. The sweat on her body shinning in the sun light as her ass took all I could give her. Building up as though my whole body was about orgasm, I let go as Susan sank down hard all the way to my balls. I'd not had that kind of orgasm before, where by my whole body seemed to be shaking. Susan watched me empty my balls up her with the dirtiest smile you could imagine. When I'd finished unloading up her, she bent over and whispered in my ear "Time to clear up your mess".

For the next quarter of an hour I willingly licked and sucked Susans asshole clean of my own cum. When she said she was satisfied and we'd kissed passinately, Susan taking some of my cum into her mouth, I collapsed. I was woken up as the light was fading. I'd slept nearly all afternoon. When I woke up the following morning in Susan's bed, we'd fucked twice more and Susan had had me gently lick her whole body from head to toe.

We did all of the work Susan wanted doing finished, but it was very much a case of sex first and DIY later. Crystal phoned every day with Susan almost always taking the phone calls in private, before passing me the phone. Each time I was frightened of slipping up and of course feeling very guilty. But each time after the call myself and Susan would engage in some form of sex. Once when Crystal rang near the end of the fortnight, Susan passed me the phone immediately. As I spoke to my wife, her mother was on her knees performing fellatio on me. I couldn't help cumming with Susans wonderful oral skills and I filled her moms mouth and throat. Crystal asked if everything was ok as I groaned and when she said "Of course it is, I know mom is taking VERY good care of you". It was the way she said it that got me thinking.

Our last fuck on that occasion was the same morning I went to pick up Crystal from the airport. She had me hammer her pussy from behind on the stairway down to her basement. She was in her basement when myself and Crystal arrived back at her house. They were both talking quietly when I'd been out to collect Crystals suit case and re entered. The look on my wife's face will stay with me forever. She couldn't have looked more knowingly and more proud. Sitting me down she asked me in a matter of fact way, if I enjoyed her mothers attentions. Feining ignorance, I told her "Yeah you're moms a good cook". My wife's answer, and it's burned in my mind, was "What about how much of a good fuck is she".

Crystal and her mom had planned the whole thing. Each time Crystal had phoned, her and her mom had discussed what we'd done sexually. Susan telliong Crystal how much of a good lover I was and that I was prepared to do anything to keep her sexually satisfied. It turns out I'm not the first of Crystals men to have had sex with her mom and from their inferences it most definately would be continuing.

Crystal herslef has become more sexual since that fortnight and now adores anal sex, almost as much as her mom. Susan and I spend time together each time Crystal out of town now, which is normally seven or eight times a year from what Crystal has told me. Each time I visit now, they openly converse and each time up to now, our sexual times together get more intense and even more dirty.

It's not the norm to have such a sordid open relationship with your mother in law, and certainly not with your wife's complete understanding and permission. That said I'm not complaining and in every way I love the two women in my life.