Her final date will be with the executioner. A serial spouse-slayer nicknamed Iran’s “Black Widow” has been sentenced to death after a lethal marriage spree that left at least 10 husbands in the graveyard over two decades. Kolthoum Akbari, 56, confessed to much of the horrific body count, the Mazandaran Province public relations office told Iranian state media last Sunday. It’s unclear how many of her former spouses perished, but the number is as high as a dozen or more and only one is believed to have lived, authorities said. Most were killed using rubbing alcohol, sedatives and other meds....