'I killed my rapist when he came back for my sister'
A young Tunisian woman was photographed naked by a friend of her father's, who then used the images to silence her - until one day she snapped and took a bloody revenge.
This story is part of the BBC's Shame series, which examines a disturbing new phenomenon - the use of private or sexually explicit images to blackmail and shame young people, mainly girls and women, in some of the world's most conservatives societies.