Touch of Madness by ML Guida

Literally – cursed by a vengeful witch, Gwen Black is divided in two – two identical halves, one good the other evil. Her evil self is committing crimes and the attractive but arrogant sheriff arrests her innocent half. He even shows her video tapes depicting a woman that looks exactly like her burglarizing stores – but she knows she didn’t do it! Convinced there’s an impostor, Gwen must prove her innocence before her handsome captor locks her away forever.
Theo has problems of his own, struggling to control his shape-shifting abilities. Every time someone he cares about is in trouble, he shape-shifts into an uncontrollable fire breathing dragon. The last thing he wants to deal with is a beautiful thief who insists she’s innocent, even when he’s got the proof, but he can’t help being drawn to her. Her presence calms the raging dragon inside him.
When Theo locks Gwen in his jail and another crime is committed by a woman who looks exactly like her, Theo is perplexed, but determined to discover the truth. He uncovers the little thief is his soul mate under a spell and the only way to break it is by a true love kiss. Can Theo control his dragon long enough to woo Gwen and convince her that he is her knight in shining armor, or will he lose her forever with the next new moon?