The girl Seung Gwoon Sheut Yee from the first LUK SIU FUNG story (THE GOLDEN ROC KINGDOM'S TREASURE) was known as a chronic liar. Was she really as big a liar as everybody thought she was, though? Everything she told Luk Siu Fung about her cousin, Princess Seung Gwoon Dan Fung, murdering Seung Gwoon Fei Yin was true from her point of view. The information was inaccurate, but that's because Fei Yin had misled Sheut Yee as well. Sheut Yee never told any lies concerning what she saw occurring at the Golden Roc King's household.
She did tell some minor fibs about being Luk Siu Fung's aunt and Fa Mun Lau's great-aunt (and that Fa was in his fifties), but other than these little white lies, she didn't seem to be a big liar.