All Three Are Cheating S**ts

My wife H drunkenly confessed to me after a night out, that she'd had, oral, vaginal and anal sex with a guy three days before our wedding. She tried to pass it off as a one off last time before we tied the knot.

What I hadn't told her, is before we got married, not only had her younger sister tried to get me into bed, but also her own mother had tried to seduce me when I was decorating for her.
I'd denied both of her families advances then, but hearing her confess made me want to get even.

As my wife was recovering from her hangover on that Sunday morning, I drove over to her sisters flat. knocking on the door, as soon as she opened it, I kissed her, put my hand up her skirt and inside her knickers feeling her pussy.
She returned the kiss, pulled me inside and over the next hour we had such a great time having sex.
She told me afterwards her sister didn't deserve me, and then let me know she knew my wife had also cheated on me again, not long after we got back from our honeymoon. Supposedly with the same guy.
Feeling angry, hurt and also horny all at the same time, I fucked my sister in law again as she leaned over her kitchen island.

But I wasn't done. Not by a long way. Not saying a word to my wife about what I'd found out, I made us both our evening meal and listened as my wife blurted on about her projects at work the following week.
In my head, all I was thinking was 'I wonder if **** likes it up her arse'.

On the Tuesday morning the following week I found out that my mother in law does indeed enjoy anal and everything else sexual for that matter.
It didn't matter to me if she accepted my advances. As if she didn't, I was going to call by my sister in laws on my way back home and fuck her again. But K was only too happy to suck my dick and have me tongue out her pussy and arsehole. And if anything, my mother in law is definitely the better fuck out of the three family members.
She's a real dirty bitch wanting me to fist her pussy and arsehole, as well as everything else we did that morning.

I was absolutely shattered by the time I reached my first decorating client, but somehow got through the day thinking about my mother in law licking and sucking on my cock, after I'd just cum up her arsehole.
I'll not lie, I have felt uncomfortable during the five months I've now been fucking my wifes mother. She and I regularly fuck, but I have stopped shagging my sister in law. Not because I felt extra guilty, her being nineteen, but because she's now dating a guy I know.
My mother in law couldn't care less, so when we fuck I use her like she's a prostitute. And believe me she loves it.

I know it'll get to the point where, either my wife finds out, or her mother will slip up. Or more likely, I'll leave them all to their cheating ways.
I'm no longer bothered about my marriage, and to be brutally honest, I'm only sticking around because my mother in law is such a fantastic fuck.