When you receive a late diagnosis of ADHD or autism, the relief of finally understanding yourself can be overshadowed by a daunting question: how do I tell my family? This book offers a clear, thoughtful path through that conversation. It begins by helping you clarify your own feelings about the diagnosis, then guides you through deciding who to tell, when, and why. You will learn specific language to explain core traits—like sensory differences, executive functioning challenges, and social processing—without jargon or blame. Chapters address the most common reactions, from confusion to denial to acceptance, and offer ways to respond that protect your boundaries while inviting understanding. There is also gentle guidance for when a family member needs time or rejects the idea entirely. The goal is not to fix anyone but to foster a mutual sense of reality. Whether you choose to tell your siblings, your parents, or your entire extended family, this book will give you confidence and clarity. Part of The Late Diagnosis Library.