A Most Classified Correspondence

Suzette Pontmercy knows that her brother is up to something, and she knows what it is.
But more importantly: she wants to help.

The sun had long since set when I saw my brother return home. His hair was ruffled and his cheeks red from excitement. A minute later he was in the room.
"By the Lord! Suzette, why are you here? Should you not be asleep?" He asked, I just shrugged pretending that my book was too exciting and my presence in his room were completely normal.
"I was having trouble sleeping... I was wondering where you were...?" I responded.