Complex sentence: He was Antony to her Cleopatra for Joe Papp, and they were married not once but twice; in short, a bold and tempestuous relationship (both personal and professional) about which Dewhurst declined to speak much.
Split into simpler sentences: He was Antony to her Cleopatra for Joe Papp, and they were married not once but twice. In short, it was a bold, tempestuous relationship about which Dewhurst declined to speak much.