Insert foot in mouth

My wife came by my workplace for lunch today.  While we were eating, she asked me about a coworker who left her position yesterday:  "Did [manager] drive her out too?"  

Yes, just what I need, to have the manager who is making things difficult hear what I have told my wife about the situation.  Fortunately, only the person serving the lunch as there at the time.  I pointed the problem out to my wife and she apologized for "not thinking."

Background:  This guy regularly chewed out a previous coworker in front of us during weekly meetings and she wound up leaving to "spend more time with her family."  Then he hired someone he knew to replace her.