Clerk Colven/Colvill (she gives him the world's fastest-acting venereal infection).

The Cruel Mother

The Laird o Wariston

any number of mostly-forgotten execution broadsides (I rather like the ghoulish ones about Mary McKinnon, the prostitute hanged for a fatal stabbing in Edinburgh in 1839)

The Black Freighter (from The Threepenny Opera)

Puccini's Turandot (and probably quite a lot of other operas)

There must be some great Indian songs about Phoolan Devi.