Do nothing

It would be unwise to provoke her further... You try to forget what you heard and act as if nothing had happened. When she comes out, you wait for her there, sitting on a bench.

Sofia: Now, I have just though of the proper way to punish you for that previous act!

Lily: And that would be...?

Sofia: Come, I need something from my house to do it.

When you are there, she takes out a small glass filled with a thick white substance.

Sofia: This substance has been collected by me just before we met... I suppose you know what it is?