This chapter explores the experiences of siblings of children with disabilities through Family Systems Theory, emphasizing that a child’s disability affects every family member’s roles, emotions, and connections. It examines both challenges—feelings of invisibility (“glass child” phenomenon), resentment, guilt, isolation, and parentification—and opportunities for growth in empathy, maturity, and pride. The chapter highlights how sibling age, gender, family communication, and the child’s independence influence sibling relationships and well-being. Scenarios and personal accounts show how siblings may feel neglected or burdened by responsibility when their own needs are overlooked. Strategies and interventions include dedicated time, open communication, peer and therapeutic support, role clarification, and acknowledgment of feelings. The chapter calls for intentional support for siblings, offering recommendations to promote resilience, well-being, and positive relationships within families affected by disability.