Pompey 's army lost the Battle of Pharsalus in 48 BC and Pompey himself had to run for his life .
Sextus stayed in Rome in the care of his stepmother , Cornelia Metella .
Sextus 's army lost the Battle of Pharsalus in 48 BC and Sextus himself had to run for Sextus ' life .
Sextus stayed in Rome in the care of his stepmother , Cornelia Metella .