Following Christie's death, the copyright for the play was owned by her daughter, Rosalind Hicks, who was unenthusiastic about the play as it was believed that the main character was based on her.
Setelah kematian Christie, hak cipta untuk drama tersebut dimiliki oleh putrinya, Rosalind Hicks, yang menjadi tak antusias dengan drama tersebut karena meyakini bahwa karakter utamanya berdasarkan padanya.