Tian Sisi had instructed Weiguo to first visit the village head's house and slip out a hint implying they were still going to take some meat to grandpa's place, letting Weiguo show just a little bit of the meat in the bowl to make sure the village head's family could see, especially the two shiny, fatty pieces on top.
As long as the village head saw these two pieces of meat, it would be equivalent to letting the villagers know that the niece didn't forget to bring a nice bowl of meat for her parents-in-law to eat. As for the sweet potatoes at the bottom of the bowl, who knows? Anyway, what the village head saw was the meat on top.
Tian Xinhua was sitting next to Sisi, and he clearly heard the bad idea that girl gave to Weiguo, but he did not stop it. Mainly because he thought Sisi's idea was quite good. There was no need to resort to a gentleman's methods in dealing with such a villain.