updated 05/17/2011 AT 4:00 PM ET
•originally published 05/17/2011 AT 6:00 PM ET
During one of the most difficult periods of her life, Maria Shriver found time to dine with one of America’s most empathetic listeners on Monday night.
Shriver joined Oprah Winfrey, her partner Stedman Graham and Winfrey’s best friend Gayle King for a meal, a source at Chicago’s RL Restaurant tells PEOPLE.
“She was there with her daughters,” the source said of Shriver. “The reservation was in Oprah’s name.” The group was at the restaurant “for several hours,” the source said.