Strange How Life Works

Over a period of four months, I was fucking my step daughter Ellie, who's a real trampy slut. But more recently my gorgeous mother in law Jane.
And it was after reading my wife's online diary from just before we got married two years ago.
Someone told me my wife, then fiancee, had cheated on me as a final fling before getting married.
I knew she kept a diary, so I read back through one from the time period, and sure enough, she's gone into detail of how she was fucked by a builder we had working on our home.
Apparently he fucked her the whole time he was working at our house, and for a couple of months after.
Once I found out I was furious, but knew I wanted to at least get even.
Fucking Ellie was and is easy. She's a nineteen year old slut, and all it took was me lying on her bed naked stroking my cock.
She didn't shout downstairs to her mum, instead she sucked in my cock, then rode it until I came up her pussy.
She wasn't even surprised I was prepared to fuck her as her mum watched tv.
But after fucking Ellie for a few months, it just didn't seem enough of a get back at her mother. Even if I was screwing her mouth, pussy and arsehole when I wanted them. Mainly I think because it was too easy.
Jane is completely different to her daughter and grand daughter. She's fifty three now and such a beautiful demur woman.
She's half English, half French having lived in France until she was in her mid twenties, and she's stunning.
What's ironic, is I was working in her cottage, decorating it for her when we first had sex.
We've always had a thing between us. And I knew she 'enjoyed' my body (I'm a physiotherapist, fitness instructor).
She'd often make comments about her daughter being a lucky woman. Yet that was about as far as she'd go. Even if I definitely did see her touching herself through her skirt one day in her old flat, as she was looking directly at me.
Jane had made us lunch as I'd been working all morning painting her hallway. I had a boner thinking of maybe fucking Ellie later at home, and Jane saw it in my shorts.
She asked me if I was getting 'uncomfortable' with her being around. So instead of being polite to my mother in law as I usually would have, I told her everything.
She was shocked at first and a little angry id decided to fuck her granddaughter. Yet she didn't throw me out, or message her daughter.
Sat on her couch with her, she told me I'd not be fucking Ellie anymore. When I said that was between me and Ellie, my mother in law put her hand on my cock bulge and repeated I wouldn't be fucking her granddaughter anymore.
Green light as far as I was concerned.
Moving her skirt up, I slid my hand inside her knickers to see if she'd stop me. Jane didn't stop me, she placed her hand on mine through the material and pressed my fingers into her pussy.
That was it from then on. We began kissing as I slowly finger fucked my mother in law.
Her hands then began to massage my cock through my shorts, and it was all very intense.
Standing up, Jane took my hand and said we were going to bed. She also said, and I remember these words precisely "I'm your mistress from now on. You only fuck me outside of your marriage".
Seeing my mother in law naked, still to this day, drives me incredibly wild with passion. She's just had her fifty third birthday, but she's got a far better, firmer and fitter body than her daughter or her granddaughter.
And what's more, having sex, making love with her, is so much more amazing.
That first time as I stared at her beautiful body making my cock throb, I realised i was going to have sex with a woman he knew what liked and wanted from a man. And to indulge me so wonderfully, we made out all afternoon.
She practically taught me all about sex all over again. Having me slow right down. Making me take my time to kiss, lick and tongue her pussy and arsehole.
Showing me how she adores having her arsehole probed deeply with my tongue. And taking as much time as she wants, to have me licking and sucking on her large labia and clit.
But as slow and purposeful she enjoys oral sex, both her pussy and arse, Jane absolutely adores me being rough with her pert medium sized breasts.
She has large nipples and she loves nothing more than to have me suck and bite hard on them.
One of her favourite positions when fucking, is to ride me slowly, grinding down as I fuck her pussy or arsehole, and have me destroying her tits with my mouth, lips and teeth.
However she reserves herself mostly for anal sex. Jane is extremely anal and often has me devouring her rear hole, before making me fuck her backside in long switch position anal sessions.
This I've learned over the time since our first time together. That first day will remain special to me. Not only because of the amazing sex, but also because she made me promise I'd be her daughters true husband, and only have her as a mistress (As she puts it).
A couple of weeks ago my wife said sorry to me out of the blue. She didn't elaborate or even try to explain her reason. Then much later on with Ellie having had me turn her down for sex again, my wife told me her mother and her had had a long conversation.
She seemed as if the weight of the world had been lifted off her shoulders, and she appeared so happy.
She said she'd spoken to Ellie, and that's why I'd heard her crying in her room. And from then on, it was a new slate between us.
I didn't once interrupt and listened as my wife unburdened her guilt without saying what she'd done.
She hinted at knowing about her daughter and I, and then about her mother. And it was then my wife said she'd like for me and her mother to remain extra close.
She didn't exactly say she wanted me to carry on having sex with her mum, but she practically might have well have done.
It was left at that until we went to bed. We had a whole night of sex with my wife going wild at times. At one point as she rode my cock, my wife said "Make sure you treat my mother as you would me".
I knew what she meant. She was telling me to indulge both of them as if I was married to each.
I didn't answer, but I did thrust upwards hard until my wife orgasmed on my cock.
Life can be so strange sometimes.