Cactus Flower

A dentist pretends to be married to avoid commitment, but when he falls for his girlfriend and proposes, he must recruit his lovelorn nurse to pose as his wife.
Distraught when her middle-aged lover breaks a date with her, 21-year-old Toni Simmons attempts suicide. Impressed by her action, her lover, dentist Julian Winston reconsiders marrying Toni, but he worries about her insistence on honesty. Having fabricated a wife and three children, Julian readily accepts when his devoted nurse, Stephanie, who has secretly loved Julian for years, offers to act as his wife and demand a divorce.