In 40 BC his mother Fulvia also died, meaning that he was now likely under the custody of his step-father Mark Antony who remarried to Octavia the Younger, sister of the future emperor Augustus.
The remainder of his childhood was likely spent either in Rome with Octavia or with Antony on travels throughout the Roman Provinces.
When the War of Actium broke out, Curio sided with his step-father Mark Antony and his next wife Cleopatra over Octavia and Augustus.
He and his half brother Antyllus (as well as Cleopatra's oldest son Caesarion) were executed after the Battle of Actium.
[10] Ronald Syme speculated that the young Curio might have been unwilling to beg for mercy due to being the son of a "loyal and spirited father", and that his mother Fulvia would have been proud of that.