My wife thinks she's the only one to have had extra marital sex. She doesn't know I know about her fucking one of our wediing guests two years ago. And indeed I didn't know until four months ago. It was my wife's mother Helen who let slip she'd walked in on them fucking, when she'd gone to freshen up in a hotel room the women had used to get changed.
Helen was drunk when she told me about her daughter cheating on me. I took advantage by telling Helen the only way our marriage would last, was if she sucked my cock.
Not only did Helen lick and suck on my cock and balls after some persuasion, I also had her licking my asshole. I wanted to cum in her mouth, but after her initial refusal for sex, she couldn't have been more eager to have me fuck her pussy and ass. She might have been drunk, but she knew enough to know just how dirty she was being as I fucked her asshole from behind. As she was telling me to make sure I gave her every drop of my cum up her butt.
I didn't disappoint her, and then watched my mother-in-law shove two fingers up her rear hole and scoop out my cum, before licking her fingers clean.
She wasn't drunk three days later when she text me at work, to see if I could call by at lunch time. Her apartment is only five minutes from where I work. So ten minutes after leaving work I was naked on her bed with her on top of me as I was licking her clit. Helen was sucking my cock in between moments of telling me I can't ever let her daughter know. I walked back into work minus a ball sac full of cum, which was left inside Helens super wet pussy.
We made a pact that day. I'd keep on visiting her for sex when we get the chance and she'll make sure her daughter becomes a good wife to me.
Both things are developing beautifully as my wife is becoming just as much of a slut in and out of the bedroom, as her mother is.