Jerks at Work

Today at work my coworker took on the role of telling me what to on a Monday morning.  She is now the office jerk.  She forgot all about teamwork and starting telling me things before I was “on the clock”   then proceeded to tell me what I would be doing and how to do it.  I gave no response.  I soon went to my actual supervisor and said that I prefer to be told of changes by you!