This article employs a critical psycho-discursive approach to social identity processes and subjectivity in an important and under-researched area; the psychological impact of domestic violence on children. We use a case study of interview interaction with two teenage brothers talking about their father's past violent behaviour to show that a highly idealised, dominant form of hegemonic masculinity - `heroic protection discourse' (HPD) - was a major organising principle framing both brothers' understandings of events. However, significant differences occurred in how each boy identified and made sense of self and others within this discourse. We discuss our findings in terms of (1) the destructive power of HPD to position sons as responsible...