Whisper the Dead (The Lovegrove Legacy) by Alyxandra Harvey. Cousins Gretchen, Emma, and Penelope are all dealing with what it means to be a Lovegrove. For Gretchen, it means she often feels like her head is going to explode. As a Whisperer, Gretchen constantly hears the whispers of other witches' spells. The incessant buzzing and pain the whispers cause makes it difficult to use her gift. But when evil becomes a menace to her community she has to find a way to master her powers.
Emma & her cousins-are uninterested in their debutante lives. All the boring balls, tiresome curtsying, & conversation about nothing at all leave much to be desired. Even the handsome Cormac is too frustratingly enigmatic to woo Emma. When debutantes start being murdered & Emma keeps finding the bodies-their worlds are turned upside down. The girls discover secret family lineage of witchcraft and their own new magical abilities, which they must now embrace in order to stop the chaos