We had a lady who worked in our building who was married to another employee of the company who worked in another office.
The husband's building was under construction, so he was temporarily moved to our building.
Security saw them having sex in her car during the day and reported it to HR.
HR called them in and basically said, "hey, this isn't a huge deal, but please stop having sex in the parking lot."
The husband was legitimately dumbfounded, and demanded to see the tape. The guy his wife was banging in her car wasn't him.
It was her boss.
It was awkward.