What is the role of Denise in the movie John Q?

In the movie "John Q," Denise is the wife of the main character, John Quincy Archibald. She plays a supportive yet emotionally strained role, grappling with the dire situation concerning their son’s health and the family's financial struggles. Denise's character highlights the stress and desperation faced by families dealing with healthcare crises, ultimately reinforcing the film's themes of love, sacrifice, and the fight for a child's life.