You have a para that comes through your classroom at different times throughout the day. She would like to be "cool" and tries to friend the students. She is very disruptive and allows students to do things that you would never allow. How do you talk to the para without causing hurt feelings?
If I were in this situation, I would exactly do this.
I would try to be more personal than your solution.
I agree a positive attitude and written instructions and discussions on what the teacher wants accomplished should make a difference.