Milkteeth by Caitlin Starling
Summary (from the publisher): From the bestselling author of The Death of Jane Lawrence comes a new, genre-bending supernatural horror about a vampire broodmother fighting against her own monstrous descent. Beatrice is a a vampire responsible for nursing newly made fledglings through the first years of their unlife. She nests in an abandoned, isolated warren of office space beneath her patron's skyscraper, raising two fractious Gorgeous—once a heartthrob, now to all appearances a living corpse—who longs for the return of the lover who made him immortal with all the fervor of a rebellious teen, and Fortunata, the scion of Beatrice's mistress, alien and ambitious in her desires. But when Beatrice decides to take on a third fledgling, the product of an attempted siring gone wrong, teetering between vampiric purity and ghoulish depravity, Beatrice finds herself strained to breaking between the societal and physical demands of her position, her own ravenous hunger, and an obse...