Night Huntress by Galenorn Yasmine

The D’Artigo sisters are half-human, half-Fae operatives for the Otherworld Intelligence Agency. A werecat who’s one of the Autumn Lord’s Death Maidens, Delilah has a funny feeling that the Hags of Fate enjoy seeing her squirm. First, her boyfriend, Chase, mutters another woman's name in his sleep. Then she discovers the Autumn Lord has a very special plan for her. But things go from bad to deadly when Karvanak—the Rāksasa—returns.  In order to get his greedy hands on both the fourth Spirit Seal and his former associate, Vanzir, he kidnaps Chase. Now, the D'Artigo sisters have to find a way to rescue the man Delilah loves without risking the safety of both Otherworld and Earth...