"I know that disavowal is an unusal form of betrayal. From the outside it is impossible to tell if you are disowning someone or simply exercising discretion, being considerate, avoiding embarrassments and sources of irritation. But you, who are doing the disowning, you know what you're doing. And disavowal pulls the underpinnings away from a relationship just as surely as other more flamboyant types of betrayal."