["Family Process, Volume 65, Issue 2, June 2026. ", "\nABSTRACT\nThis paper presents a new framework to account for change mechanisms in Emotion‐Focused Therapy for Couples (EFT). Building on Lane et al.'s (2015) integrated memory model, the Relational Memory Reconsolidation model described here posits that EFT reshapes partners' relational memory structures through emotionally intense moments of expressed vulnerability and responsiveness. These vulnerability‐responsiveness events allow partners to access and transform memories of past relational experiences (i.e., episodic memory) as well as associated beliefs about themselves and the relationship (i.e., semantic memory). This process of emotional activation and reconsolidation allows maladaptive interaction patterns, which are rigid and stressful, to evolve into more adaptive, emotionally responsive exchanges. These emotional moments activate and transform relational self‐states that are responsive to interpersonal cues and can shape partners' self‐concepts in a relational context. As therapy progresses and emotionally significant interactions are repeated, the coactivation of adaptive and maladaptive self‐states updates neocortical memory traces, leading to changes in higher‐order relational semantic structures (i.e., the relational self). These moments foster alignment in partners' perceptions of their shared reality, characterized by mutuality in feelings, practices, memories, goals, and identity. Clinically, the framework highlights the need to elicit one partner's core vulnerable emotions and, within the reconsolidation window, disconfirm related expectations (e.g., rejection) through the other partner's empathic and supportive response. This process may transform key components of partners' relational memory, including relational episodic memories, semantic structures, and procedural emotional responses.\n"]