Hmmm, let's see. Eos is jealous of Cephalus's wife, Procris, whom he truly loves. Procris is jealous of Eos, who whisked her husband away and in some versions of the story succeeded in seducing him...

The folks in the story of Cephalus and Procris sure have some trust issues. And that means they're all about testing each other's loyalty. Cephalus goes as far as to disguise himself as another dud...