Cleopatra actually had two brothers, Ptolemy XIII and Ptolemy XIV, both of whom she was married to. Ptolemy XIII was her first brother/husband, but with the help of Pothinus, forced Cleopatra to flee Egypt with their sister Arsinoe. Caeser, who at this point was already Cleopatra's lover, reinstated her to the throne. However, Ptolemy XIII allied himself with Arsinoe against the pair, but Roman reinforcements forced them to flee the city, and Ptolemy XIII drowned attempting to cross the Nile in 47 BC, aged around 14-15. Cleopatra was then married to her second brother/husband, Ptolemy XIV, who was co-ruler with her (though she retained the power) until shortly after the death of Caesar, when he died (possibly murdered) at the age of about 15 and was replaced with Cleopatra's 3-year-old son Caesarion (Ptolemy XV).