This paper applies concepts from literary theory and neuroscience to examine how the tone of a client's narrative reflects the tenor of the relationship between therapist and client. I consider how autobiographical memory is co-constructed first by child and caregiver and later within other significant telling relationships, such as that between therapist and client. I explore how the implicit, relational aspects of telling emerge in these narratives as tone, and I offer a case history illustrating how changes in the tone of a client's narrative measure interpersonal (and intra-psychic) change.