The Widow of Falbrooke Court by Kasey Stockton

Can true love break the curse? Amelia Fawn is cursed—or so she believes. How else can she explain each of her husbands' deaths within the first year of marriage? So after the ton names her the Black Widow and warns eligible men to stay clear, Amelia vows never to marry again. Not even if she falls in love. Charles Fremont has loved Amelia Fawn his entire life. But after enduring countless rejections and watching her get married three other times, he's finally had enough. He swears a vow to never ask anything from her again. Even if it kills him. Book three in the Ladies of Devon series, The Widow of Falbrooke Court, is a clean Regency romance continuing the story of the four women who make up a literary society in Devon and form a lasting friendship.