[4] The couple had a son named Servius Sulpicius Rufus together (who would be the father of Sulpicia).
[6] Historians Tyrrell and Purser have proposed that Postumia may have been the one who encouraged her son to join in Caesar's army during the Civil War, when his father sides with Pompey.
[8][10][11] Postumia appears as a frequent character in Robert Harris Cicero trilogy of novels.
Her marriage to Rufus and affair with Caesar are featured in the novels to varying extents.
[12] She also appears in the Masters of Rome series by Colleen McCullough, in the book Caesar's Women she is brought up as a potential marriage candidate by Caesar, but his mother and other female relatives dismiss her, stating that she is a drunkard and her family is not prominent enough for him to marry into.