What's The Difference Between That And Not Knocking On The Door?

"That's impossible. I didn't even buy it. How could you have possibly seen it in the bag?" Grace asked. "This is a hospital!" A nurse came over and warned, "Please take it outside. Don't disturb the other patients." Only then did they walk outside.  They still couldn't find a solution after arguing for a long time. Moira insisted that Grace had bought it, but Grace insisted she didn't. It would be clear if they went home and took a look, right? "Enough. We'll talk about it when we're home," Zaden said. After arriving home, Moira immediately ran to Dulcie's room. She took out the bag of pudding and poured the contents onto the tea table. The peach-flavored pudding was among them. There weren't many.  Moira took a peach-flavored pudding and asked, "Grace, is this what you meant when you said you didn't buy it?" The evidence was before them. It wasn't looking good for Grace.  "Zaden, Grace is vicious. Even if she didn't know that Dulcie is allergic to peaches, it is still a huge mistake.