Today's OneWord: Furious

When Grandpa got the call from my father that he would be visiting in the next few days, he was furious. I could tell even though he kept his voice level, simply by how he aggressively stirred his coffee and how his hands shook when he clutched the mug. I tried to ask him about it - whether or not we could just tell my dad to stay away, especially after what he had done to my mom - but he refused to respond to any of my questions. So I left him alone, until the day came.