Mercy by Jodi Picoult

From #1 New York Times bestselling author Jodi Picoult comes a “sensitive exploration of the balance of love” (Publishers Weekly).

Two cousins are driven to extremes by the power of love, as one helps his terminally ill wife commit suicide at her request, and the other becomes involved in a passionate affair with his wife’s new assistant. In the midst of betrayals and trials, forced to confront the limits of their love, these cousins must ask themselves how far the borders of their hearts can extend.