Tristan, Zhen-Zhen, Grandpa Lu, and the twins were still talking in the living room when Mark and Daniel arrived.
Well, the two evil cousins were temporarily staying at the Davis Family Mansion as if they were freeloaders. They were penniless right now so they were grabbing this opportunity to stay at the Davis Family Mansion.
Their parents won't help them anyway because of the warning from the elders. But it was so ironic since they were currently staying at the house of the person who punished them.
Their sudden arrival interrupted the conversation of Grandpa Lu, Zhen-Zhen, and Tristan.
Mark and Daniel were holding two large plastic bags containing some items. Those were the materials and props they would be using for Tristan's surprise.
Upon seeing Zhen-Zhen in the living room, they immediately hid the two plastic bags behind them so that Zhen-Zhen would not see the materials.