As Sam was talking about the angels, Lilly was both listening, but remembering something else. During the nightmare day, Flauros had revealed a lot.
"By any chance, are the demons of your world planning to enslave all of mankind?" she asked. It was an honest question, because if Sam told her no, then that would signify that there were indeed many different realms.
She then laughed, but at a different irony. Before all of this, Lilly had worked homicide, and specialized in cold cases. Never would she dream that the supernatural was real, but here she was now investigating it.