An only child and avid horse lover, Mallory lives at Mahwa, a ranch next to Heartland. She is way too old and wise for her years and she's a bit of a busy body, eavesdropping when she shouldn't be, telling tales, and getting involved in things that don't concern her. She gives Jack plenty of dating advice, but who will she get advice from herself, when a young cowboy takes a liking to her?