Draco smiled when his father asked for the vial, when he wanted nothing better than to hide it and taste the remaining drops. "Of course, Father." He used his wand to levitate the vial to his father, while he kept his eyes on Violet.
She smiled. "I won't. I can keep a secret." She was learning more and more since moving to the castle, and Draco reminded him every other day like she was a child. "Thank you," she said at the compliment. However, when Grandpa asked about a favour, she turned to Draco. She wasn't supposed to take potions from strangers, only from uncle Severus and even then she wasn't supposed to tell people.
Draco smiled pleased that she remembers, and nodded. Violet turned to Lucius again. "All right, but I want chocolate afterwards. Potions taste bad."