Dear Coworker,

What I would like to say is, “Mind your own **** business,” but I’m trying desperately to find a more polite way to put it.

If you are not my supervisor and you are not my mother, you really do not have any room to tell me what to do.  You can ask me to do something for you, work-related, and I’d be happy to help, if I can.

Other than that, please keep your nose out of my business.

Sincerely,

NoMoreMissNiceGirl