Tracy Blaine

Tracy Blaine was the main villainess from "Interference," episode 4.06 of Motive. She was played by Sara Canning. Tracy Blaine was the second wife of natural juice company owner Steven Blaine, and the stepmother to Steven's son, Owen. Her past revealed that she was in a previous relationship with a man named Martin Harris, who was the father of young Aiden Harris. Tracy was also a villainess diagnosed with Munchausen by Proxy, and she would habitually poison Aiden to get his attention. Her method of poisoning was to give Aiden fruit flavored antacids (which were loaded with sodium), under the claim that she was giving him candy. Tracy's poisoning killed Aiden, and following her murderous actions, Tracy broke off her engagement to Steven.

Cindy Vernon, Aiden's music teacher, suspected that Tracy had killed Aiden, but she couldn't prove it in her complaint to Child Services. Following Aiden's death, Tracy later married Steven following the death of his wife in a car accident, and became the stepmother to Steven's son, Owen. Tracy turned heel once again and began poisoning Owen as well, using the same method she used on Aiden. She also started a popular online blog, and spoke about dealing with Owen's illness while basking in the immense attention she received, with her viewers and even Steven being not knowing that Tracy was a maniacal villainess.

Tracy and Owen were both followed by Cindy, who found out about the blog and correctly figured that Tracy was harming Owen like she did with Aiden. She tracked them to Central Park, where Tracy caught Cindy and threatened to call the police on her. Cindy decided to call them herself, while lashing out at Tracy for her psychotic actions. In response, the evil Tracy snarled at Cindy and ordered her to stay away from her and Owen, while snatching the phone away from Cindy. Afterwards, a struggle ensued between the two women, with Tracy impaled on a branch. She begged Cindy to help her, but Cindy further impaled the villainess and killed her, doing so to save Owen from her evil actions.