Some years ago I went to live with one of my ex girlfriends in an little village in Suffolk, after she divorced from her first husband.
I was new there and didn't know anybody, one evening we went together to the main local pub, it was quite crowded and there was no room at the tables, so we seat on the stalls at the desk.
After a while a girl approached and sit next to us, and started to talk with us.
The place was very noisy, the music was very loud, so it was quite hard to hear clearly and understand each other... especially for me because I didn't spoke english very well yet, but also for my ex girlfriend and this girl too because they wasn't close enough to each other, as I was sitting in the middle... so this girl begin to overreach on my lap to get closer to my ex.
At first I didn't quite get if she was just trying to talk, but then she leaned further more towards my ex... so much that I begun to fill her big tits slightly touching me!
At first I kept quiet like I wouldn't notice anything, keeping talking and acting normally...

I even suspected that she could have been a friend of my ex, and that they secretly organized a prank to me... or perhaps to test my reactions, as i knew my ex and another friend of her organized similar traps when they were suspicious that their husbands may went with other women.
However, a bit at time this girl begun to lean leaned further more, and my ex too, despite not so much as this girl... at one point they nearly seem to be flirting with each other in front of me, so much that I begin to dream that we could finish the evening at my ex house doing a threesome like Idid with some other girlfriends... also because after a while I felt a hand touching my crotch!

This went on for the time of a couple of drinks, hiddenly, as all the rubbing was going on underneath this girl body, in fact my ex apparently didn't noticed anything... and once finished the drinks we simply wave off this girl and returned home as nothing happened.
I met again this girl when I was on my own after a couple of weeks, we begun to chat and she told me that my ex didn't know her, but she knew well my ex because she used to cheat with one of her ex boyfriends a couple of years before (before to get divorced from her first husband, the little sl*t)
She told me that she fancied me, so after her first little "innocent test" with her tits, once sure i wouldn't overreact in public, she decided to pay back my ex rubbing her big Italian man's cock for a while!
She also told me that my ex had other sex affairs with some other guys in the village, and even with a couple of bisexual girls... my ex was a naive sl*tty Essex girl, and despite what she believed or pretended, it's difficult to do such things and keep it secret once you move to live in small country villages!

I fixed with this girl and I went to her flat few days after, from that moment on we kept seeing regularly each other quite often and had great hot sex times together, until I had to leave England and return to Italy for some family problems.
It was such a shame I had to leave!

Despite I didn't managed to told immediately to my ex that I was cheating with this girl (and another one too) I'm sure a bit at time she could give up such ridiculous silly secret cheatings and start a better and relaxing open minded funnier life... she could kept seeing her lovers without having to hide from me, or even invite them for a threesome... and probably we could invite the girl from the pub or some couples to have some fun with us...
also because after all, I openly admitted that such sexual experiences weren't a new thing for me since the beginning, and she didn't seem scandalized at all, just a bit envious!