Marked By War by Milly Taiden

Alyssa, one of the three Fates tasked with guarding the gates of Olympus, is spoiling for a good fight. She’s bored to tears. Nothing’s happened in forever. When three gods sneak onto Earth, she meets her match on the battlefield and wants nothing more than to kick his annoying butt. It’s hard enough fighting her hormones, but it’s impossible to keep her mind or hands off the gorgeous god.
Ares, God of War, visits Earth without permission and is caught by Alyssa, a Fate who can kick him to the curb. The God of War vanquished? Never. Seriously, not gonna happen. What he does want to happen is to get a taste of the sassy Fate. But he finds that in addition to his magic being rivaled, this Fate threatens to conquer his restless heart.
When a mysterious, powerful magic attacks, she’ll need all the help she can get to keep them all alive. Ares can’t let Alyssa get hurt. He’ll give everything he has to keep his little spitfire from diving into battle to her death. Even his life.