Witch's Bane: Urban Fantasy Romance (Demon Assassins, Band 2)

Last of the demon assassin witches, Roz, Jenna, and Colleen have escaped disaster so far, but their luck is running low. Demons strike at Colleen's wedding, and Roz launches desperate measures. As she shapeshifts to stay one step ahead of evil, at least it takes her mind off her other problems. Personal ones. She burned through a couple of marriages and hooked up with a string of loser men before, after, and in between. Though she wants to be happy for Colleen, the jealousy bug bit deep and hasn't let go.
Ronin set his sights on Roz the day he met her, but she's so prickly getting close to her requires scheming. He casts an enchantment to lure her at Colleen's wedding, but she rebuffs him. Demons swarm out of the ether before he can come up with another strategy. Killing them trumps everything.
Roz is used to calling the shots. So is Ronin. Sparks fly. Tempers run hot, right along with an attraction too heady to ignore.