The Fifth Amendment to the Constitution gives you the right to not incriminate yourself. That means, you have the right to "remain silent" and not respond to questions or otherwise say anything if doing so would tend to incriminate you criminally, or give rise to criminal liability. So you probably do have the right to not say anything to the authorities--not that that prevents them from investigating or prosecuting based on other evidence. If you haven't alread, retain a criminal defense attorney with experience in this area IMMEDIATELY--the potential consequences are enormous, and include jail time and being put on sex offender registries. You need advice, counsel, and representation to defend yourself, or at least mitigate any penalties.