Was Cleopatra part of a dynasty?

Cassius also wanted to prevent Cleopatra from bringing reinforcements for Antony and Octavian. But he could not execute an invasion of Egypt because at the end of 43 BC, Brutus summoned him back to Smyrna. Cassius tried to blockade Cleopatra’s route to the Caesarians.

For this purpose Lucius Staius Murcus moved with 60 ships and a legion of elite troops into position at Cape Matapan in the south of the Peloponnese. Nevertheless, Cleopatra sailed with her fleet from Alexandria to the west along the Libyan coast to join the Caesarian leaders, but she was forced to return to Egypt because her ships were damaged by a violent storm and she became ill. Staius Murcus learned of the queen's misfortune and saw wreckage from her ships on the coast of Greece.

He then sailed with his ships into the Adriatic Sea. In 41 BC, Mark Antony, one of the triumvirs who ruled Rome in the power vacuum following Caesar's death, sent his intimate friend Quintus Dellius to Egypt to summon Cleopatra to Tarsus to meet Antony and answer questions about her loyalty. During the Roman civil war she allegedly had paid much money to Cassius.

It seems that in reality Antony wanted Cleopatra’s promise to support his intended war against the Parthians. Cleopatra arrived in great state, and so charmed Antony that he chose to spend the winter of 41 BC–40 BC with her in Alexandria. To safeguard herself and Caesarion, she had Antony order the death of her sister Arsinoe, who was living at the temple of Artemis in Ephesus, which was under Roman control.

The execution was carried out in 41 BC on the steps of the temple, and this violation of temple sanctuary scandalised Rome. 36 Cleopatra had also executed her strategos of Cyprus, Serapion, who had supported Cassius against her wishes. On 25 December 40 BC, Cleopatra gave birth to twins fathered by Antony, Alexander Helios and Cleopatra Selene II.

Four years later, Antony visited Alexandria again en route to make war with the Parthians. He renewed his relationship with Cleopatra, and from this point on, Alexandria was his home. He married Cleopatra according to the Egyptian rite (a letter quoted in Suetonius suggests this), although he was at the time married to Octavia Minor, sister of his fellow triumvir Octavian.

He and Cleopatra had another child, Ptolemy Philadelphus. At the Donations of Alexandria in late 34 BC, following Antony's conquest of Armenia, Cleopatra and Caesarion were crowned co-rulers of Egypt and Cyprus; Alexander Helios was crowned ruler of Armenia, Media, and Parthia; Cleopatra Selene II was crowned ruler of Cyrenaica and Libya; and Ptolemy Philadelphus was crowned ruler of Phoenicia, Syria, and Cilicia. Cleopatra was also given the title of "Queen of Kings" by Antonius.

38 Her enemies in Rome feared that Cleopatra, "...was planning a war of revenge that was to array all the East against Rome, establish herself as empress of the world at Rome, cast justice from Capitolium, and inaugurate a new universal kingdom."39 Caesarion was not only elevated having coregency with Cleopatra, but also proclaimed with many titles, including god, son of god and king of kings, and was depicted as Horus. 40 Egyptians thought Cleopatra was a reincarnation of the goddess Isis, as she called herself Nea Isis. Relations between Antony and Octavian, disintegrating for several years, finally broke down in 33 BC, and Octavian convinced the Senate to levy war against Egypt.

In 31 BC Antony's forces faced the Romans in a naval action off the coast of Actium. Cleopatra was present with a fleet of her own. According to Plutarch, Cleopatra took flight with her ships at the height of the battle and Antony followed her.

42 Following the Battle of Actium, Octavian invaded Egypt. As he approached Alexandria, Antony's armies deserted to Octavian on August 1, 30 BC. There are a number of unverifiable stories about Cleopatra, of which one of the best known is that, at one of the lavish dinners she shared with Antony, she playfully bet him that she could spend ten million sesterces on a dinner.

He accepted the bet. The next night, she had a conventional, unspectacular meal served; he was ridiculing this, when she ordered the second course — only a cup of strong vinegar.