To add to the previous response, even if the parents had provided “sex education” that would not have prevented the brother from preying on his sisters. Most 15 year-old boys are not attracted to 10-year old girls nor are they sexually interested in their sisters. No one has to expressly tell them that this is wrong. Blaming the parents for not telling him that (assuming they did not know what he was doing) is misplaced. The brother is responsible for his own acts. If the parents knew but did not act to stop it then there is a whole additional layer of problems there. In that case the parents AND the brother share the blame for it. But nothing gets the brother off the hook legally or morally here. I agree, she ought to answer the questions honestly if she goes to the interview. It may make the difference in protecting some other child from being sexually mistreated by him. It is also what the law demands: lying to the police or in court could land her in legal trouble. She does have the option, though, not to speak at all unless she is served with a subpoena or summons. So her choice if she has not been served is either not go in for the interview at all or, if she does to, answer the questions honestly.

