Actually, it is MY mother who will come up and "take over". She will rearrainge furniture, hang pictures on different walls, pull up flowers and bring clippings from her own garden. She is full of "advise" and if you contradict her she lets the tears flow.
I hate to admit this, but she is getting up there in age and rarely visits and that is FINE.
In life there is always the "difficult person". A boss, a child--someone. They will challenge you like no other--they really make you become aware of yourself in ways you didn't know exist.
Handling them with grace and dignity is a challenge. You can't expect them to change. Who has to be the grown up? You do. I know it's hard. My mother is a royal pain. I hate that I have to be the adult with her.