Thora's mother is the wife of Thora's father and the mother of Thora and her three brothers. She is also the grandmother of David and his siblings; and the great-grandmother of Arthur, D.W., Kate, and their cousins.
Thora's mother is the wife of Thora's father and the mother of Thora and her three brothers. She is also the grandmother of David and his siblings; and the great-grandmother of Arthur, D.W., Kate, and their cousins.