In early August, Spain's former King Juan Carlos left the country following allegations of financial wrongdoing. But the country's affection for its monarch began to unravel as far back as 2012, following an ill-fated elephant hunt. With the king on that safari was his former lover Corinna zu Sayn-Wittgenstein. She talks exclusively to the BBC about a multi-million euro gift from Juan Carlos, her claims of harassment by Spain's secret service - and that elephant.