As much as we all strive to be mature adults.....I can't help but wonder if the tried and true "High School Grapevine" method might work.

While at work start asking co-workers in passing some vague questions.

Do you know AAA from the BBB dept?
I wonder if she's seeing anybody?
etc...etc...etc

By noon the questions will reach her and by end of day you'll have the answers.

Just an idea.....good luck!