Some say, and it seems plausible, that Commodus Antoninus, his son and successor, was not begotten by him, but in adultery; 2 they embroider this assertion, moreover, with a story current among the people. On a certain occasion, it was said, Faustina, the daughter of Pius and wife of Marcus, saw some gladiators pass by, and was inflamed for love of one of them; and afterwards, when suffering from a long illness, she confessed the passion to her husband. 3 And when Marcus reported this to the Chaldeans, it was their advice that Faustina should bathe in his blood and thus couch with her husband. 4 When this was done, the passion was indeed allayed, but their son Commodus was born a gladiator, not really a prince; 5 for afterwards as emperor he fought almost a thousand gladiatorial bouts before the eyes of the people, as shall be related in his life.
120 6 This story is considered plausible, as a matter of fact, for the reason that the son of so virtuous a prince had habits worse than any trainer of gladiators, any play-actor, any fighter in the arena, anything brought into existence from the offscourings of all dishonour and crime. 7 Many writers, however, state that Commodus was really begotten in adultery, since it is generally known that Faustina, while at Caieta, used to choose out lovers from among the sailors and gladiators.
121 8 When Marcus Antoninus was told about p181 this, that he might divorce, if not kill her, he is reported to have said "If we send our wife away, we must also return her dowry". 9 And what was her dowry? the Empire, which, after he had been adopted at the wish of Hadrian, he had inherited from his father-in‑law Pius.