"O-Oh no! I'm sorry!"
Emilia shows a panicked expression on her face. To someone, they will see that she is definitely scared her wine is now spilled on Duke Clementine's daughter. But she cannot fool Penelope. Although there is a panicked look on her face, she can still see her lips curving upward a little.
This is obviously an intentional play organized by Emilia.
But what is she expecting to happen? That Penelope will shout at her? Is she waiting for her to get scolded for being clumsy and ruining her dress? Does Emilia really think she will become hysterical over a simple dress?
'Since you are trying to play, then let me join you.'
In truth, Penelope is right. Emilia is hoping to anger her and show everyone her true colors. Emilia knows that Penelope is putting an importance on her reputation. That's why she wants to destroy it in front of these people.
Instead of getting mad, Penelope shows Emilia a smile.