I think this is also the first time you see that Lucy can speak Parisian French. Something she learned in school back home. Which she often uses to talk exclusively with Sylvie!
Quick translation for you.
Quebecois: I always knew you were a little geek deep down
French: Shut the fuck up
Sylvie is played by the wonderful
GryphaLucy is played by myself!
All taking place in the world of
Summertown