The lamia's plans were falling apart bit by bit, even her backup ones, and it was all because of that emperor who suddenly wanted to make a move after laying dormant in Hell for thirty years.
She was going to use Jenna to create an Amaira she could manipulate; the lamia was going to get her family back together and things back to the way they were, but all her efforts were in vain.
For centuries since Elias was sealed she had been controlling the Hendrix family. Using them to give herself more time to strategize, and to learn how she would be able to make a perfect clone of Amaira.
The lamia led the family of brunettes to believe that any female child not born with dark brown hair is to be killed at birth for they are destined for evil and a life filled with darkness. She brainwashed them, controlled them.