Sibling rivalry, competition and disagreements are considered a normal component of childhood and adolescence. To identify physical, psychological and relational sibling abuse, practitioners and parents need observe behavior and ask questions about the sibling's relationships that will help them understand if there are characteristics that differentiate aggression from abuse. Sexual sibling abuse requires additional considerations. Victims may initially deny the existence of any type of abuse but this may be because they haven't realized it yet. Different questions about the prevalence of types of aggression, frequency, intention of harm, magnitude of the aggression and unidirectional dominance help assess the existence of abuse. Regarding sexual abuse, individuals are less likely to openly talk about it, unlike other forms of abuse such as physical or psychological. For this reason, in addition to ask direct questions about sibling sexual abuse, practitioners and parents must look out for behaviors that may indicate the presence of sexual abuse. Another challenge comes when differentiating between sexual abuse and adequate sexual behavior. The biggest difference relies in that incest happens with the consensus of both siblings while sexual abuse does not. A victim may not be aware that he/she did not consent because of innocence or lack of understanding of what was happening. The latter generally happens to children who are too young to understand sexual implications and boundaries.