Is “Remarried Liu Bei and honored as Empress Dowager” true?
attested in history
The Records of the Three Kingdoms, Book of Shu, Biographies of the Two Lords' Consorts and Sons records that Lady Wu was first married to Liu Mao, then taken by Liu Bei, and was successively made Duchess, Empress, and Empress Dowager. The novel's plot is completely consistent with the official historical record.
Lady Wu
Both official histories and the novel record that she was married to Liu Bei and was successively made Duchess of Hanzhong, Empress, and Empress Dowager.