The existence and family living with a sibling with a disability implies a dynamic and a structure with meaning to children and their circumstances. However, a sibling that accompanies, helps, or takes part in family life, usually is lower analysis compared with children with disabilities. The goal of this work is to analyze the behavior of children before siblings with disabilities. Following two children’s opinions in this context. It is intended to make some analysis about the children's behavior towards their sibling, and finally, seek reflection on the structure of family relationships.