Around this time of year last year (Just before Halloween) my fiancee caught me fucking her mom in their home. We'd all been drinking and my future wife crashed out. Jayne my fiancee's mom asked me if I'd ever played any kind of strip card game. Pretending to be playing some kind of card game I didn't understand for about five minutes, she said "Screw this, lets fuck". Sucking on my dick for some time first, she then had me then lick out her pussy and ass. I'd just about driven my cock up Jayne's bushy c**t from behind, when my fiancee walked into the kitchen where I was thrusting hard into her mom. She screamed out loud, but for some bizarre reason, Jayne told me to just carry on. I was so embarrassed for myself and Jayne, but mostly for my fiancee. However Jayne didn't bat an eyelid and even backed onto my cock as I'd slowed down. About to pull out, my fiancee walked over drunkenly and slapped me, but then said sluringly "Well you might as well finish off the fuck". So I did.
Jayne orgasmed well before I did and was about to orgasm again, as I came hard up her pussy. Totally having forgotten about my fiancee, I turned to see her leant over a breakfast bar stool, watching my cock slide out of her moms well fucked pussy. All she said as she tried to get off the stool and I let my cock flop forwards was "Don't think you'll be fucking me without washing that". Jayne put her to bed and I joined her to smoke some weed. She told me it was a one off, but it hasn't been, not by a long way.
It was extremely embarrassing the next morning facing my fiancee, but she didn't seem too bothered about the previous nights events, especially when her mom apologized and gave her a huge hug. It left me feeling awkward until I told them was going. My fiance kissed me hard and passionately in front of her mom and told me she loved me. Turning to her mom she told her that I was hers, but then added "But". Nothing else was said as I left them to go to work. And hardly anything has been said since. My fiancee knows I'm still fucking her mom, yet doesn't say much. All she does say is "Keep her happy" Nothing else, no elaboration, just that. And our wedding day has now been set for sometime next July.