Now that Zhang Yuying is mentioning fortune-telling, implying that Xiao Yao is still deceiving people with Maoshan Taoist techniques. If it weren't for Old Tong's trust, the Tong Family might really treat her, Xiao Yao, as a fraud. This places Xiao Yao, who just gained the good graces of the Tong family, in an awkward position.
"Then I really must thank younger sister Ying for her trust. Although I've only learned a bit from my master, I still have to thank Grandpa for his trust. This little issue, I can resolve!" Xiao Yao said sharply.
What Xiao Yao meant was that indeed she practiced Maoshan Taoist arts. You can say I'm a fraud, but as long as Grandpa Tong believes in me, that's enough.