Mary Elizabeth Wilson
Between 1955 and 1957, the U.K.'s Mary Elizabeth Wilson loved and lost four husbands, earning herself the title of the “Merry Widow of Windy Nook.” While some of her marriages lasted only a few short weeks, it was enough for her to establish herself as the rightful heir of their estates, inheriting money after each death. It’s not surprising that people started to get suspicious of the happy widow, who had a penchant for dark humor, asking the local undertaker for a discount. According to the BBC, at one of Wilson’s many wedding receptions, her friend asked her: "What shall we do with these sandwiches and cake?" Wilson replied: "We'll keep them for the funeral." Police soon caught wise to her actions. The bodies were exhumed and found to contain insecticide. She was sentenced to death in 1958 for murdering two of the husbands.
Wilson was poised to become the last woman hanged in England, however her sentence was reduced to life imprisonment. She died four years later, aged 70, in 1963.