Wanted: Perfect Mother (1970)

"Have a love affair with your family..."

It tells of a couple, Dante and Elsa who hires a new governess, Carla to care for their four children. The governess quickly establishes rapport with the children and the husband creating rumors of an affair. Before things could go wrong, Carla decides to leave. Elsa dies in a car accident and the widower decides to marry again and getting a new mother to his children. Carla is the popular one among several choices, but the head servant poisons the minds of the children against her.