Someone I worked with:

He had a very long term friend who he sailed regularly with.

His friend's wife just happened to work in a different business in the same building & she said to her husband that Friday nights she always had drinks with us.

Every now & then the husband would phone & ask to chat with his Wifey.

We always said she was in the bathroom or some other excuse. She never once had drinks with us. 

We know she was having an affair, even before she told us not to say anything.

All of us would have liked to give her a good hammering, fantastic figure. Calling her a pocket rocket.

My work colleague, I said just keep out of the topic. Better you know nothing. It's a no win situation. Better to not "see" anything.

In summer we would fall off our chairs when she came down the stairs in what appeared to be no undies. Maybe wearing an invisible G-strings dividing the finer elements deeply!

I really don't know how I didn't cut my fingers off with the work I was doing at the time.