You probably saw last week the terrible story of the Shafias. Mohammad Shafia was an Afghani, who -- after making money in property in Dubai -- emigrated to Canada.
With him he brought two wives. Rona Amir Mohammad, his first, had been unable to bear children and he had taken a second, Tooba (Muslims are permitted four), by whom he had seven children. Rona, who was passed off as a cousin, helped to rear the family.
In June 2009, Rona, 52, and her step-daughters Zainab, 19, Sahar, 17, and Geeti, 13, were found drowned in a submerged car. Wiretaps later recorded Mohammad saying: "God curse their generation, they were filthy and rotten children."