This sister, Octavia, he was extremely attached to, as, indeed, she was, it is said, quite a wonder of a woman.
Plt Antony Chapter 31: Antony marries Octavia

Everybody concurred in promoting this new alliance, fully expecting that with the beauty, honor, and prudence of Octavia, when her company should, as it was certain it would, have engaged his affections, all would be kept in the safe and happy course of friendship.
Plt Antony Chapter 31: Antony marries Octavia

Those who had seen Cleopatra, whom they could report to have no way the advantage of Octavia either in youth or in beauty
Plt Antony Chapter 57: Antony and Cleopatra go to Athens