Answer:
The Child Protective Services (CPS) caseworker (who may or may not be an actual social worker) is working against you. The caseworker may put on a show of being friendly and caring, but only because she’s trying to get more information from you. (For the purpose of this article I’ll use “she” although many Child Protective Services social workers are men.)
The caseworker’s job is to prepare a legal case against the parents, while placing the children in a different home. They believe they are helping children. They do not want to help parents because parents are the adversary. When they go to court, the parents are on the other side of the courtroom.