Oak and Ink by Devon Monk

This book was previously published in Dirty Deeds 2, which is no longer available.

Ricky Vargas stands six feet two, with magic tattooed across every inch of her skin, and a broken heart she doesn’t want to talk about. She’s a Crossroads who provides sanctuary for supernaturals on the run, helps negotiate peace between monsters, and takes exactly no shit.
Cardamom Oak is a half-dryad wizard on the run from an angry goddess. Stealing from the gods is a terrible idea, but his sister’s life is on the line and he’ll do anything for her.
None of this is Ricky’s problem, except Cardamom once saved her life by giving her that first magic tattoo. He also broke her heart.
When he shows up on her doorstep asking for help, Ricky is prepared to send him packing. Unfortunately, her annoying heart has other ideas, even if that means dealing with a swamp siren, her jerk of a father, and an enemy strong enough to tear her world apart.