How is Casey's mother described in the novel, Writers & Lovers?

Casey's mother is described as a free-spirited, loving, and charismatic woman. Her sudden death shortly before the novel's start, catalyzes Casey's subsequent emotional journey. Originally married to Robert Casey's father, her mother runs off with a younger man when Casey is just 15. She stays away for almost two years. She later makes amends with Casey, and the two retain a close relationship until her death. Casey remembers her often throughout the novel, recalling her kindness, generosity, and grace. Casey struggles to reconcile her passing throughout the narrative, missing her and wishing she could be like her.