It's a very long story but I'll try and keep it short. My wife and I are in our early/mid 30's, been swinging for about 2 years now. She is from a super conservative family (3 kids and really amazing successful, loving and caring parents) and that's probably also a reason why she likes exploring her sexuality so much. Both us and her siblings live in different countries to the parents who are now in their 60s, and we visit about twice a year and usually stay with them in their house when we do.

We try and not play with people in our own city (with our careers we have to be very discreet) so tend to look for swinging experiences when we travel, including when we visit the parents-in-law in the country they live in. Needless to say we tread carefully not to be found out when we are staying there - that was until our second last visit.

We were on a swinging site (SDC) and low and behold, out of nowhere found a profile that quite clearly was that of her parents. Never picked it up as always filtered for younger ages. Neither of us could have imagined in our wildest dreams that their parents would be into this, but seems they are. She was a bit appalled but I've been attracted to her mother since I first met my wife (who knows I have a bit of thing for older women) so needless to say I was pretty excited. She is close to her mom and after not being sure whether we bring it up with them, she eventually did to her mom - won't go into the details here but there was lots of crying but also some sense of relief for both of them. Turns out they used to do it mostly in their 50s and just kept a profile mostly for my father-in-law to perve a bit.

Anyway, so a few awkward dinners not mentioning any of this again, we go home, and my wife and I start discussing it more. I made no secret of the fact that it is my ultimate dirty fantasy to be sexual with her mother, and the amazing wife she is, seemed to be very comfortable with me saying things like that. She speaks to her mom regularly and once again without going into all the details, turns out the mom felt the same about me. Needless to say swinging with her parents were totally off the table, but me and her mom by ourselves - something to consider. We all only swing as couples and have never done separate rooms but given it's her mom and trust is high, the father-in-law and my wife both agree the mom and I can do it, only as a once-off.

So on our next trip to them we have a SUPER awkward meet up, say nothing for a day or two and then it comes up over dinner and drinks. Everyone is onboard, and we agree it makes more sense if the mom and I go do it at a hotel. So on the Friday night the mom and I get picked up by our Uber and leave their family home with my wife and father-in-law there to go to a nice five star hotel in the city. The plan was to do dinner first but straight after checking in (that's another story all together, we had a lot of funny stares) it was clothes off and we never made it to the restaurant until we eventually left the next morning after having brunch in bed.

It was the most explosive sex I've ever, ever had. I think I came 4 or 5 times over that 18 hour period, my mother-in-law probably double that. And the Saturday night we are all having dinner like nothing happened. A few days later we leave for home and everyone all good, just one happy family. I love my wife endlessly but it's so amazing to also have this experience with my mother-in-law and must say it has made me genuinely love her even more too. And believe it or not, more than happy if it never happens again - it was just a great bonding experience for us all. That's it! :)