Oh, dear, I think, Pip, that Creidesca is asking because SHE wants to know. I don't think she's testing you or anything, are you Creidesca? Maybe I'm wrong...
From Dae Jang-geum: Sun-dol: "Are you trying to dry me up and kill me? Why do you say the same things over and over every day? Rather, come and hit me once! Aigu!" But then: Dr. Lazarus: "By Grabthar's hammer, by the suns of Warvan... You shall be avenged."
yes, I'm definitely not testing you guys, I really want to know--no one has been able to answer me yet. I didn't even figure out Kang Mo's mom was mute till much later in the drama, though before then I kept asking myself why she doesn't seem to be speaking, and it only hit me that she was mute when I had rewatched EP 6.