A "stage mother" is a term used to describe a parent, usually a mother, who pushes their child into performing arts like acting or dancing with excessive ambition, often interfering and controlling their child's career. Full definition
I feel like some sort of exploiting stage mother now. (housegoeshome.com)
The script, by Hope Floats screenwriter Steven Rogers, identifies a pattern of abuse in the athlete's life, passed like a baton between two domineering figures: insult - slinging stage mother from hell LaVona (Allison Janney, relishing every line of bilious dialogue) and Harding's impotently frustrated, small - town - loser of a beau, Jeff (Sebastian Stan, who apparently can act, when not playing the brainwashed sidekick of a super soldier). (avclub.com)
Melissa Leo, in a glue - spray bouffant, is vital as the kind of boxing - world stage mother who could kill a kid with love, and Amy Adams, as the bartender who becomes Micky's girlfriend, has a spot - on tough - chick allure. (ew.com)