WATERVILLE — A culinary argument between a brother and sister about whether to use butter or margarine turned violent, resulting in an attack with a knife-edged barbecue spatula, police say. A 21-year-old man called East Wenatchee police on June 6 to say his 17-year-old sister had just attacked him and tried to cut his neck with the serrated edge of the spatula, wrote Officer Carrie Knouf in a police report filed in Douglas County Superior Court. The sister told Knouf she was making macaroni and cheese when her brother asked if she was using butter. “They began to argue over...