The Untold Prophecy

Everyone could commit sins and do evil. Even the gods could do this kind of things. No one is exempted.

Zeus commit sin, not just an ordinary sin. Rhea has a prophecy in order to punish Zeus. Zeus refused it, he couldn't accept it. But once it's a prophecy no one could break it.

Zeus told his mother to hid it so that no one else would know about this.

But when the right time comes, it will happen no matter what. For now, the prophecy hid by Rhea and remains untold.