Maria Llovet's Violent Flowers #2

"Vengeance blooms in their veins." Setka tells Anna about Erzsébet's past: Erzébet was a very devoted mortal lover of Carnelia's, but when she refused to turn her into a vampire, she tricked Nikodemos into doing it himself, later descending into a spiral of blood and madness. Carnelia and Anna attend a supernatural party hosted by the sea creatures known as The Triplets, to try to find out where Erzébet is, but it turns out she's at the party herself...