Seth continued to observe the intense exchange with great interest. It was amusing to see Cain get riled up with a human. Damien on the other hand wasn't willing to give way and admit fully he was wrong.
Truth be told, he can actually try to check Aisha himself as well as the contract they had signed. He didn’t brag about it much since he was a bit lower in the demon hierarchy, but Seth was actually a Harbinger as well. The 7th to be exact, he was in-charge of all demon-human contracts both in the land of the living and in Hell.
But as playful as Seth was, he still wanted to see how Cain and Damien’s argument would turn out. He would rather stay quiet unless one of them called upon him for help. Although with the way things were going as of the moment, Seth doubted either of them would ask him to lend a hand at all.