Someone at my board posted an article pic that had spoilers for the last ep.
Cassie discovers she is pregnant with Azazeal's child. If the child is born, about 200 daemons will be unleashed into the world. If the child dies, the natural order of things will be restored, but that means Cassie will lose Thelma forever. Cassie must now make a choice between Thelma and the child.