Zhou Huaijin confessed the whole story to the Queen. He knew clearly that the Queen agreed to join the court, only because she loved the King, otherwise the Queen would never have enjoyed life in the court at all.
During the past few years, he was aware of how true the Queen was being to the King, but in the past decades, the King had way too many women and a world to control, so many things had changed. Yet one thing that was certain was that the Queen was still in love with the King. Whether or not he was showing the same feelings was unknown to Zhou Huaijin.
He told the Queen the truth, because he hoped that the Queen would make a clearer consideration about that. She should be aware of the situation she was in.