There's a slight smile at the fact that he's finally caught up.

"Lilith."

The first wife of Adam, first woman. First witch. But that part would be a surprise for another time, a secret held with the rest of her story. He doesn't yet need to know what happened to her after the wilderness.

The next part she only does because she knows it's important to Crowley.

"He has an apartment in the Up. When you're free of this building."