Of Love and Desire

Of Love and Desire is a 1963 film directed by Richard Rush and starring Merle Oberon, Steve Cochran and Curd Jürgens.

Plot
American engineer Steve Corey moves to Mexico to work at one of the mining projects owned by Katherine Beckman and her half-brother Paul. He finally is introduced to Katherine, and the man that he is taking over for, Bill Maxton, informs him that Katherine is his for the taking: "All you have to do is touch her—she goes off like fireworks. There were plenty of guys before me, and there'll be plenty after me."

Steve thinks that Katherine is what he expected but ends up developing a crush on her. As their relationship develops, Paul gets upset and reintroduces her ex-boyfriend Gus Cole to her to lure her away from Steve. Half-siblings Katherine and Paul are carrying some emotional damage from the past which they need to work out.

Critical reception
From online reviewer website Cool Cinema Trash:

Of Love and Desire is an old-fashioned soap opera with a morality firmly entrenched in the 1950s. Sex before marriage is bad. End of story. The resulting guilt and shame this causes for the film's heroine is what makes Of Love and Desire such a melodramatic treat for fans of cool cinema trash.