Yes, and Cleopatra has received similar treatment - a seductress, luring illustrious Roman men away from their duty. Per usual, it is the woman to blame in these affairs.
In the same book in which Boccaccio slandered Leontion, he also heaped abuse on Cleopatra. It was an English poet who finally conceded to show her in better light: Geoffrey Chaucer. He laid the blame for Antony's infidelity at his own feet, and held Cleopatra to have lived and loved more nobly and more faithfully than any man.
What she really was is of course far more inspiring; a wry wit, a student of international politics, a scholar in the tradition of her earlier ancestors, a capable successor to the middling heirs of those same ancestors, a wartime commander in the field at both land and sea, and a strident negotiator with the ruling power in the Mediterranean. While she conversed with these Roman generals in her native Koine Greek, she was also said, though accounts differ, to be the only Ptolemaic ruler to have gone to the trouble of studying the local Egyptian language.
When Antony was slain and with him her last hope for her people's freedom and security, she died, a martyr in Chaucer's words, at her own hand.