
Ok, here my teory
Like many are saying the soul of the original Raeliana is now in the body of Beatrice, but why? I think she knows about the book and the fact that she was going to be killed and Beatrice would end up with the duke. So maybe she resorted to some sort of black magic (let's call it like that) Not just to save herself maybe she's also aiming to end up whit the duke with the body of Beatrice. But things didn't go as planned, Raeliana is still alive and is now the fiace of the duke, she's probably plotting of killing her (by using the red hair woman) and maybe take the duke by using Beatrice's "charm" since he's supposed to fall for her at first sight if I remember correctly
Like burning her will solve your problems
Did you not learn your lesson already