Sweeter Than Wine by Michaela August

On the eve of Prohibition, Alice Roye, a young war widow, desperately needs a vintner for her winery, because without a license to make sacramental wine for the Church, she'll have to go back to her mother's Barbary Coast bordello. Alice doesn't expect to marry the new vintner, but blackmailed by the matriarch of her late husband's family, she does. Can she trust this gaunt, blond stranger-or keep from falling in love with him?