There is a lack of international research focusing on how the siblings-in-law of adults with a learning disability experience their commitment to provide support. Using narrative research, the authors have aimed to gain an insight into the perspectives of 14 siblings-in-law (living in the Flemish part of Belgium) about the decision to live together with a family member who has a learning disability. The decision to live together usually begins with a crisis. However, the decision process is a complex mechanism; it involves dynamics and events within a family (between family members both with and without blood relationships) and is intensified by experiences within a society that holds different views about families and disability. We are aided in gaining a deeper understanding of this complex process by considering interpretations based on the contextual framework of Boszormenyi-Nagy.