Ovid offered another perspective on Hercules and Iole in Heroides 9, a letter from Deianira to the hero, with a sly dig - here's Kline's translation:
Now a foreign rival is brought before my eyes,
and I cannot hide from myself what I suffer!
You won’t let me avoid her: she walks like a captive
through the middle of the city to be seen by unwilling eyes.
But not with unbound hair in the manner of a captive:
she confesses her good fortune by her seemly looks,
walking, visible far and wide, covered with gold,
just as you yourself were dressed in Phrygia:
|Omphale in Hercules' garb|