Vera Sisson

In order to save her wealthy father from disgrace and a possible prison sentence, a daughter agrees to marry the gigolo who's been blackmailing him. (imdb)

Without explanation, William "Still" Waters, the head of a London business, asks stenographer Monica Trant to be his "official fiancée" for 500 pounds. Monica agrees in order to help support her brother. Monica is introduced to Waters' family at his home. She charms his mother and other relatives, and even wins over the reserved Waters, but she soon resents the business nature of their proposition and returns to London. Waters then explains the reason for the strange request.