This happened years ago, but was fabulous gossip at the time! We had a team night out, and one of the Directors decided to join us. Bit weird, he didn't usually, but whatever. Late into the evening, his PA is crying in the loos, and as I consoled her, she admitted (between sobs) that she and the Director were having an affair, but she'd just found out his wife was pregnant. I told her she needed to forget about married men, put her in a taxi home and decided I would keep it to myself.
The next day, the office is buzzing with the gossip that the Director and his PA are sleeping together. It turns out PA was indiscreet all evening, and told at least 4 people!
Anyway, my favourite bit of this story is when a few days later, Director sets up a series of meetings with all the individuals who were on the night out, and sat there and lied to each of our faces that "There is nothing going on between PA and me, and if I find out who is spreading this rumour, there will be a disciplinary!" So I had to sit there and say "Nothing to do with me Sir!", all the while knowing I'd heard exactly what a shit he was straight from the horse's mouth!
Plus he had teeny, tiny hands, and called himself "Phill". Not Phil, like a normal person, Phill, with an extra "l" for being such a special sausage.