stage mother
Noun
Meaning
English Wikipedia has an article on:stage motherWikipedia
stage mother (plural stage mothers)
(US) The mother of a child actor.
Examples
My dad was like a stage mother he always pushed me to do what I wanted.
Terri and her mother arrived. She was obviously a dedicated stage mother because she was loaded down with camera equipment, looking like a Japanese tourist.
My mother was the worst kind of stage mother. She would make me and my younger sister and brother little duckling costumes and put us in kiddie shows.