In this paper we employed a prospective design to examine the effect of child sexual abuse (CSA) on life-course offending by comparing victims to both their siblings and random controls in the Netherlands. Information on victimization was gathered from court files and on offending from official criminal records. We found that victims of CSA were more at risk of offending than random controls, but so were their siblings. Only female victims were more likely to offend than their own siblings. The increased risk for offending was not specifically found for sexual offenses, instead it was found for various types of offenses. The found difference between female victims and siblings held true for abuse perpetrated by someone outside the family. We therefore conclude that family and environmental factors are the most important to explain offending among male CSA victims, while these factors alone are not enough to explain the effect of CSA on offending for females.