This would be Portia, Brutus's wife. She swallowed live coals, poor dear.
He commits suicide after the battle of Phillipi
Both Cassius and Brutus commit suicide in the final act.
She commits suicide by eating hot coals.
Brutus' wife Portia commits suicide (by swallowing live coals, a nasty way to go) in Act IV. Brutus, Cassius and various members of their army commit suicide in Act V.
Brutus led 60 conspirators to kill Julius Caesar.
It foreshadows the coming events of Brutus meeting the ghost of Caesar at Philippi but the true meaning is Brutus's mind getting to him. Brutus soon commits suicide by Strato holding is sword and him running into it because he does not want to surrender to Antony.
Cleopatra's first husband, Ptolemy XIII died, trying to escape from Caesar's army. He drowned in the Nile. She poisoned her second husband, Ptolemy XIV. Mark Antony, if you consider him her husband, committed suicide.
Julius Caesar
Portia
Yes.
Husband and wife.
Brutus realizes Caesar's assassination did not restore the Republic, but had set in motion a series of events creating chaos.