Tell the organization that you need to be assigned to a different social worker because this one has been totally inappropriate with you. Have you discussed with your counselor how intrusive this s.w. has been.

Why do you need to have a social worker from this "foundation?" What is she supposed to be helping you with?

You seem to have a clear idea of which questions are inappropriate. Trust you judgement. Next time she asks an inappropriate question, say: "I'm going to have to end this conversation now." Then end it.