In "The Story of Ruth," what happens to Naomi when Ruth gets married?

During the time of the Judges when there was a famine, an Israelite family from Bethlehem - Elimelech, his wife Naomi, and their sons Mahlon and Chilion - emigrated to the nearby country of Moab. Elimelech died, and the sons married two Moabite women: Mahlon married Ruth and Chilion married Orpah.