No, you don't have to answer CPS questions, nor should you without first consulting with an attorney. Anything you say can be used against you in child custody court, divorce court, and in criminal court. However, it's important to point out that not answering questions can have significant consequences - including the imposition of a Child Safety Plan that will keep you away from your kids. If CPS shows up unexpectedly at your door, do not let them into your home without a warrant and do not allow them to interview your children. Politely tell them that you have an attorney who will intervene on your behalf and then immediately contact an attorney.