They say that he had taken treasure amounting to a hundred centenars of gold [about L400,000] from the treasure-houses of the two cities of Carthage and Ravenna, since he had obtained sole and absolute control of the management of them.
When Antonina heard this determination of Theodosius, she never ceased to lay traps for her son and to concoct unnatural plots against him, until she made him see that he must leave her and retire to Byzantium; for he could no longer endure the designs against his life.

At the same time she made Theodosius return to Italy, where she enjoyed to the full the society of her lover, thanks to the easy good-nature of her husband.

Later on, she returned to Byzantium in company with both of them.

It was there that Theodosius became alarmed lest their intimacy should become known, and was greatly embarrassed, not knowing what to do.

That it could remain undetected to the end he felt was impossible, for he saw that the woman was no longer able to conceal her passion, and indulge it in secret, but was an open and avowed adulteress, and did not blush to be called so.
For this reason he returned to Ephesus, and after having submitted to the tonsure, joined the monastic order.