The "Refreshments" at Olivia's Wedding

So the latest part of he story just dropped today and in it I think I figured out Olivia Voldaren's plans.

>!When she cuts open her arm to feed Edgar blood to wake him up Sorin outright says that it will affect Edgar in such a way that their memories and emotions will mingle. The effect of this is seen where Edgar regards Sorin as a simple "Party Pooper" instead of noticing the chains restraining him. She then promptly awakens most of the other elder Markovs who show a similar effect. !<

So you know how there are blood fountains at this wedding? I think they are tainted by Olivia's own blood, which would turn their loyalties to her specifically. Its basically a coup against the other bloodlines.