After Shao Qiyang and the kids were done being excited, they quickly realized that Mu Jingzhe hadn't eaten yet. Therefore, they studied the remaining dumplings and picked some up for Mu Jingzhe, asking her to eat quickly so that she could bite into a coin as well.
There were six of them, and each of them had picked up one dumpling, so Mu Jingzhe was offered six dumplings in the end. After she finished eating, seeing that she hadn't bitten a coin, each of them picked up another dumpling for Mu Jingzhe.
This put Mu Jingzhe in a difficult position. Because of the sumptuous dinner, Mu Jingzhe wasn't hungry to begin with. Eating dumplings was actually just ceremonial, but now, she couldn't refuse, so she was in a tough spot.
She couldn't possibly bite into a coin because she had only put a coin in six of them.