staff meetings

Hi Michell. I have a problem with one of my employees. She has decided that she is her own boss and the boss of some of my other employees, and even some of the customers! It is partially my fault because I let it happen. I was ill for a year and needed her to take more responsibility. Now that I am back to work full time, I see that many of the policies that I had in place have been changed or discarded all together. She has taken over. How do I regain control of my business without making her feel like she is being pushed out?