The Witch and the Wolf

Lord Jeremy North's curse is to become a werewolf during every full moon, turning into a bloodthirsty monster that kills with no remorse. When he finds a woman nearly frozen upon his doorstep, his sense of honor compels him to help her, even at the risk he might kill her himself.

Lillian Merriweather hadn't planned to get caught in a blizzard while
traveling the English countryside. Nor had she planned on finding refuge
in a house full of secrets. But Lillian has secrets of her own. And
what she's running from is not far behind...