It was the most emotional episode in “Shark Tank” history as three orphaned siblings pitched their late father's invention called "the cupboard pro." They say as their father was getting the prototype together, their mother Elizabeth was diagnosed with breast cancer. She died in 2012 at just 47 years old. Their dad, Keith, a New York City firefighter, continued perfecting his cutting board with a built-in cup. He was then diagnosed with cancer related to the September 11 attacks.