Research has commonly explored siblings of people with disabilities’ roles in care for their brothers or sisters with disabilities. Social policy has also commonly framed young adult siblings of people with disabilities as ‘young carers’. However, there has been less consideration of the implications of care for the relationship shared between young adult siblings with and without disabilities and of what this may mean for social policy. What do different types of care mean for sibling relationships? What are the relational and social policy implications of care between siblings?