Um yeah I was thinking her lair type place, but having it be in the woods or something so Dorothea can't just escape and find her father or Liam. And so that way her secret evil practices are hidden.

I was going to have her come in, maybe carrying Dorothea all like "Look at me doing your job for you Marshal." And then taunt them both a bit, like showing Sam that the sun has come up on the other side and the mirror is no longer a doorway so she's stuck in this world, before tossing them into a dungeon or having them be taken out of Eldonia or something. So Sam and Dorothea can escape. And get lost in the woods. If that sounds good to you.