Always a Bride (1953) Peggy Cummins, Terence Morgan, Ronald Squire

Victor Hemsley and his daughter, Clare ply their trade at swanky Riviera resorts, where they pose as a married couple---hence the title---and he "disappears with all of her savings" and sympathetic money contributions pour in on her from the wealthy guests. She would prefer a more settled life and meets and falls in love with Terence Winch, an investigator for the British Treasury.