House of Demons and Bones by Meg Xuemei X

Sy
I’m no longer a dirty little secret.
Two powerful heirs now know about Barbie and me, but they intend to keep it that way to protect us.
Warned by the oracle, “Follow your heart, lose everything,” Killian has yet to decide which woman he’ll choose. He can’t have everything—he must choose love or the crown.
While Barbie’s luck runs out, my star rises with three heirs courting me. It turns out I’m not just a monster that feeds on sex and violence. I’m what the supernaturals have been searching for—the oldest magic in the flesh.
The enemies close in on Barbie and me. And our father is coming.
They say, with the God of Ruin, everything will fall. But Barbie and I will stand in his war path, along with our five princes.