The aim of this study was to explore how varying degrees of narcissistic admiration and rivalry relate to negative affective responses in different interpersonal conflict scenarios. Participants included 297 English-speaking adults (157 women, 139 men, 1 undisclosed gender; Mage = 42.34 years; SD = 13.35) from Canada, USA, Australia and the UK. Participants read a series of vignettes depicting different hypothetical interpersonal conflict scenarios in different contexts (e.g., with a coworker or friend). For each vignette, participants imagined themselves in that scenario and rated their anticipated affect, aggression, and perceptions of the warmth and dominance of the other person involved in the scenario. We employed a multilevel modelling (MLM) approach to investigate how situation (vignette type) and personality (narcissism) predict negative affect. An initial intercept only model revealed significant variation in negative affect scores both within and between participants. Preliminary results revealed that both the specific conflict vignette type and narcissistic rivalry were significant predictors of negative affect, with certain situations evoking more negative affect than others. Narcissistic admiration, however, was not a significant predictor of negative affect. Overall, these findings suggest that negative affective responses to interpersonal conflict situations are shaped by both the context of the situation as well as the individual's level of narcissism. By identifying specific situational triggers that lead individuals scoring high on narcissism to exhibit maladaptive behaviours, the study offers practical insights for policymakers and clinicians that can inform the development of strategies and interventions aimed at mitigating the negative impacts of narcissistic behaviour in various contexts.