Who is Nora Kramer Arbuckle from Where You Once Belonged: A Novel and what is their importance?

Nora Kramer's father is a college professor when Pat Arbuckle meets her. They date for several years before marrying. After eighteen years of marriage, however, Pat feels they have little in common except for their daughter. After their daughter's death in a car accident, Nora leaves her husband to assist her father and decides to stay with him rather than return to her marriage.