Worlds Colliding (Supernatural) Book Twelve

Catty Winchester and her husband, the Angel, Castiel, along with the rest of the family, think that Sabrina Winchester, the True Hybrid and Catty and Cas' daughter, is dead. Not only do they find out that she's alive, but they find out that Mary Winchester, Sam, Dean and Catty's mother, is back from the dead.
Dean's wife, Ness Singer-Winchester, their daughter Amara, and the former Angel, now-Human Octavia, Sam's fiance and the mother to his twin Nephilim daughters, have been kidnapped by the London Chapterhouse of the Men of Letters.
With the help of the Angel Levi, Sabrina's crush, the rest of the family have to find them.
How will the rest of the family react to Sabrina surviving and Mary returning from the dead?