Tiffany Toribio has pleaded not guilty in the suffocation death of her 3-year-old son, Tyrus. Why do I call the 23-year-old Albuquerque woman the World’s Worst Mother. She admitted to suffocating her son, performing CPR, and then changing her mind and re-suffocating the boy. She actually saved the boy and then killed him again. She then buried him in a local playground where he was found by a family. Bet those poor kids will need therapy for a long time.