Just as Sirius Black was coughing, Kreacher also stepped out of the emerald flames.
He waved his fingers, poured a glass of water, and handed it to Sirius Black. "Oh! Good thing Kreacher came along too... otherwise young master would have been rude again."
Sirius Black swallowed a mouthful of water and stopped coughing. He shoved the cup into Kreacher's arms and said viciously, "Thanks, but shut up!"
"Young master at least still understands manners, though only half of them." Kreacher continued waving his fingers and poured a glass of water for everyone.
"Oh! Young Master Vizet, you look truly radiant!" He walked over to Vizet and bowed. "Would you like some snacks? Kreacher will prepare them for you at once."
"Kreacher, long time no see..." Vizet greeted him with a smile. "How about some cake? Everyone can have some."
"What a generous and considerate Young Master Vizet..." Kreacher bowed again. "Kreacher will prepare it at once!"
After saying that, he did not return to the fireplace to go back through the Floo Network, but directly left by Apparition.
"He's finally gone!" Sirius Black let out a breath and invited everyone to sit down.
Besides his regular work, Lupin had also been learning about the Muggle World through various channels, working hard toward the goal of "going out into the whole world";
As Lupin's close friend, Sirius Black was naturally influenced by him and had also begun learning about new things in the Muggle World;
In fact, before Sirius Black had been imprisoned in Azkaban, he had always paid attention to trends in the Muggle World, or he would never have tinkered together a Flying Motorcycle.
So outside of work, he and Lupin would leave Grimmauld Place and personally travel through streets and alleys, carefully observing the changes in