Midnight Loyalties - L. K. Latham - Bog

One great romance while she still has time: That's not too much to ask. But Harry?
While Harry isn't the man of anyone's dreams, he is the man she needs. Every night, she poses, and he paints. As painting follows painting, more of those not-quite-humans make themselves known to her. Kitten watches as with each stroke of Harry's brush, humans and unhumans form new lines and shapes, creating unions between the classic and the new. The more time they spend together, the stronger they become. They could rule an empire, but there are many who want to stop them. Maybe someone should.
Now, Hunters gather in the city determined to destroy unhumans and the humans with them, even if it means destroying the city.
Kitten never wanted to hurt anyone, but after the first death, it's so easy. Now, it's time to pay.