Should a social workers opinion be taken over a mother's gut opinion?

? In regards to what? Not enough information to have an opinion. Sometimes, mother knows best.... And sometimes, she does not.
No way to know. Without knowing the quesiton, the circumstances and "the truth", one cannot answer. I would trust that whatever the issues is, that there is adequate dialog, open lines of communication and that all are dealing with the facts at hand. Keep a cool head and do what is best for whomever!