sentences:  This Livia was the famous Empress, the wife to the emperor Augustus and mother of the second emperor Tiberius.Therefore, through the adoption of his son, Marcus Livius Drusus and his family (the Drusi) became eventual ancestors to the imperial Julio-Claudian dynasty.Drusus had a sister, Livia, whom he married to his friend and brother-in-law Quintus Servilius Caepio.