Once Is Not Enough (1975)

Storyline:

January Wayne, the sheltered, much-loved daughter of a formerly successful Hollywood producer, goes home to New York after a lengthy stint in a Swiss hospital. Mike Wayne has fallen on hard times and decides to marry for money. January is an innocent young woman who searches for her place in the world. Pursued by her rich new stepmother's playboy of a cousin, she instead falls hard for a much older man, a Pulitzer Prize-winning writer who's a surrogate for her father, before tragedy strikes.