The WitchSlayer (Witch Bound, Book 1) - Opal Reyne

When Amalia’s cat brought home a strange flying lizard during a terrible storm, she had no idea that it was a Dragon. Or that he would save her from burning at the stake, only to imprison her in his lair when she saw his human face. Now she is stuck in this cave with a moody, hot-tempered, and arrogant warrior—one who has killed her kind by the dozens. She expected to feel trapped, but he somehow makes her feel unbelievably…safe.