Pythias

Pythias was a 1st-century female Roman slave (possibly of Greek origin) in the household of Octavia, the first wife of the Emperor Nero, who divorced Octavia in 62 AD to marry Poppaea Sabina. To fabricate evidence that could be used to justify murdering Octavia after the divorce, Poppaea and Tigellinus, the Prefect of the Praetorian Guard, attempted to compel Octavia's maids to make false claims of her adultery during her marriage to Nero. Pythias refused. She was tortured, but she famously proclaimed that Octavia's genitalia were cleaner than Tigellinus' mouth.