Kay Ridgeway-Mostyn

In the stage play Murder on the Nile, Kay Ridgeway-Mostyn is supposedly the richest woman in England. Kay is married to Simon, who previously was engaged to Jacqueline de Severac.

Kay and Simon spend their honeymoon onboard the steamer Lotus.

The character of Kay Ridgeway-Mostyn is a rewriting of the character Linnet Ridgeway-Doyle from the novel Death on the Nile, from which the stage play is adapted.