Work advice: I monitor the security cameras at work. I just saw something I definitely shouldn't have.

Good Job is Slate’s advice column on work. Have a workplace problem big or small? Send it to Laura Helmuth and Doree Shafrir here . (It’s anonymous!)

Dear Good Job,

There has been an ongoing rivalry between two women at my workplace, “Debby” and “Barbara.” Recently, it’s taken an ugly turn.

Debby has begun an affair with Barbara’s husband (he works in our company, but in a different department). I know because I work in security, and one of the cameras picked them up “getting cozy” in a conference room. Should I say something to Barbara, or just stay out of this one?

—People Don’t Understand That Cameras Are Everywhere

Dear People Don’t Understand That Cameras Are Everywhere,

Before we get to your question, I want to thank you for this public service announcement and echo