What happened to Susanna in Raintree County?

In "Raintree County," Susanna is a central character who struggles with her identity and the societal expectations of her time. Throughout the novel, she faces personal turmoil, including her mental health challenges, which ultimately lead to her tragic fate. Susanna's journey reflects themes of love, loss, and the search for self in a turbulent world, culminating in her eventual death, which deeply affects the protagonist, John Wickliff Shawnessy. Her story symbolizes the complexities of life and the impact of societal pressures on individual lives.