Friends and Strangers by J. Courtney Sullivan

An insightful novel about the complicated friendship of two women at very different stages in life. City girl Elisabeth is an accomplished journalist and new mother, struggling to adjust to life in a small town. Sam is a senior in college and the babysitter Elisabeth has hired. When Sam finds a kindred spirit in Elisabeth's father-in-law, the true differences between the women's lives become starkly revealed and a betrayal has devastating consequences.