The show, which airs on OWN: The Oprah Winfrey Network, follows Montgomery as she and her son run two restaurants in St. Louis and struggle to open a third. Montgomery has been filmed scolding her nephew when he shows up late for work. In another episode, she pushes her grandson to get better grades in school.
The show has brought more people to her restaurants. "There was a line around the block after the third or fourth episode," says Montgomery. Sales have jumped 70 percent at the restaurants, which serve Southern dishes such as pork steak smothered in gravy and candied yams. It debuted in 2011. A fourth season began filming in March.
Montgomery began selling $20 T-shirts in the restaurants after the show started. The shirts feature Montgomery's quotes from the show.
One of the quotes could serve as advice for small businesses wanting to get into reality TV.
"If it don't make money," the shirt reads, "it don't make sense."