I love that question same I would wonder.

I wonder how Zeus took possession of those peoples daughters. If he were caught kidnapping young girls / women, then I would think there would have been an uprising. Those Mid-easterners are and always have been very critical of who enters into the family ties.
So did he lie and indicate to them that he had a special place for their daughter(s), did he pay them in gold? As Aziz said, "Some how he has this young girl..." I am sure she died, or wound up wishing she had.