If a child does not tell anyone about the abuse, it is because he or she must have consented to it?

False. Children often do not tell for a variety of reasons including the offender's threats to hurt or kill someone the victim loves, as well as shame, embarrassment, wanting to protect the offender, feelings for the offender, fear of being held responsible or being punished, fear of being disbelieved, and fear of losing the offender who may be very important to the child or the child's family.

http://www.neighborhoodlink.com/article/Community/SEX_OFFENDER_FACTS