Are you sitting comfortably? Viv Groskop talks to Dame Stephanie "Steve" Shirley CH, the businesswoman, philanthropist and technology pioneer. They explore why she changed her name - and why she brought her kitchen stool to America to give her TED talk in front of Bill Gates. Dame Stephanie argues that women must learn to ask for money: our input won't be valued if we don't value ourselves. She reveals how she learned a "healthy selfishness" after ending up in hospital, and tells Viv the single secret of success in business and romance...