When Lee asked her that question, Shin started avoiding eye contact.
Shin(with a small smile): I've managed to pass... Now let it be, why are you so curious about how I've passed the lie detector?
Elizabeth was observing Shin, from the time Shin said she has managed to pass and after a while, she understood what would have happened...
Elizabeth (with whimsical expression): ohhh no, Shin don't you dare tell me you've done it...
Shin(making an evil smirk while nodding her head in agreement): uh-oo... Looks like I've got caught...
Elizabeth(rolling her eyes): ugh gosh Shin, what I was thinking is what you've done right?
Shin(tapping Elizabeth's nose while smiling): yes, what you're thinking is absolutely 100% positive.
Lee was giving questioning looks coz he is clueless about the conversation the girls were having.
Lee(making fake cough): ugf...ugf... Shin... Would you care to explain what were you talking about??? How did you pass the test???