DaybreakBy: Belva Plain The doctor's office is cool, white, sterile. But the doctor's words are searing: blood tests prove beyond a shadow of a doubt that Margaret and Arthur Crawfield's beloved, dying son is not their child. Now they must face Peter's death and the shock of having a son they have never met. Grieving, yet compelled, they begin a search that will tear two families apart. Laura and "Bud" Rice share an elegant home and two children, brilliant,