Steve Irwin’s son dreams of having a relationship as strong as his mum and late dad. Robert Irwin, 20, who was left devastated when his TV presenter conservationist dad died in 2006 aged 44 from an injury caused by a stingray while filming an underwater documentary in the Great Barrier Reef, now runs a zoo in his native Australia and has become a broadcaster. He told Australian Women’s Weekly magazine about admiring his mum Terri and dad Steve’s bond: “They hit everything at 100 per cent together, they were a team – it was them against the world. “They were fighting the good fight, shoulder to…