Barefoot by Elin Hilderbrand

Sisters Vicki and Brenda decide to spend the summer on the island of Nantucket in the house they inherited from their aunt. Vicki has recently been diagnosed with lung cancer and has two young sons. Brenda had an affair with a student, Walsh, and lost her job at a university in New York City. They are joined on Nantucket by Vicki's friend, Melanie, who is pregnant and upset over her husband Peter's affair. Into their lives comes local boy, Josh, home from college for the summer. He agrees to babysit Vicki's sons on weekday mornings so Brenda can take Vicki to chemotherapy. These four characters' lives are interwoven into a story about survival, support, and learning where you belong. I've enjoyed all of Hilderbrand's previous novels and Barefoot is one of her best. If you like books about women's relationships (and as a added bonus--a great sense of place on Nantucket), give her books a try.