When a new genetic condition is diagnosed within a family, genetic counselors often describe a sense of responsibility towards other at risk family members to be appropriately informed about their status. Successful communication of genetic information in families is contingent on many factors. While a small number of probands directly state their intention not to inform their relatives, many who do intend to communicate this information appear to be unsuccessful for a wide range of reasons and may benefit from follow up support from a genetic counselor. Drawing on the reciprocal-engagement model (REM) of genetic counseling practice we explore how enhancing family communication about genetics raises a number of ethical and professional challenges for counselors-and describe how we resolved these. A subsequent manuscript will describe the counseling framework we have developed to enhance family communication about genetics.