FTP, all these murders occur in what work with a prominent incest plot, a play by John Ford?
Among those whose hopes are dashed in this play is Philotis, who is advised to retire to a convent by Richardetto.  Philotis had hoped to wed Bergetto, the nephew of Donado, but her plan ends with his murder, which is part of a larger conspiracy that also sees the death of Hippolyta.  Hippolyta was the mistress of Soranzo, who holds the banquet that is the setting for the final scene, which also sees Vasques murder Giovanni.  This occurs shortly after Giovanni arrives with the heart of Annabella, his sister and recent victim, on his dagger.  FTP, all these murders occur in what work with a prominent incest plot, a play by John Ford?
Among those whose hopes are dashed in this play is Philotis, who is advised to retire to a convent by Richardetto.  
Tis Pity She's a Whore