<p>In the family balance of a new child acquires a greater complexity if it presents disability, considering from the focus on the person who has disability and their parents, being rare that it is about the experience or coexistence of the brothers, their answers and personal approaches. In this sense, it could be said that father, extended family and siblings have been under-studied. This paper aims to reflect on the behavior of a child who has a sister with intellectual disability and who has expressed the aspects of the relationship with her, expressing concern and worries for her care, for her future and for the relationships he has with his sister. The student is assessed with High Intellectual Capabilities (hereinafter AACCII), with what the analysis acquires significance in its known dyssynchrony (cognitive and emotional), being significant the need for intervention in the affective development of a child with a cognitive power relevant.</p>