The reason they wanted her death was not only because of her birth but also the fact that the supernaturals wanted nothing to do with the goddess and their kin.
Although the supernaturals lived away from the humans, it has been noticed that the vampires still drink blood from humans, but not enough to kill them, except recently when news reached the human king that there were a few numbers of deaths, almost as if the corpses had been left shriveling with bones, and their bodies were no longer familiar.
This happened after Draven and Sebastian had left for their realm when Sarah had been so excited that her life would be changed.
"The vampires," the king barked, seated on the throne, his face grim with annoyance, "They are responsible for these deaths."
"Father," panicked Sarah, who sat on a smaller stool facing Helen and Gwen, the Queen seated next to the king with a few guards about, "No one is certain this is done by them."