Female Animal (1970)

A sultry Latin peasant woman, who has overstayed her welcome in her relatives' home, is run off the road while bicycling by a wealthy aristocrat. Immediately attracted to her, he hires her as his "maid", and introduces her to the good life. She soon finds herself in a bitter power struggle between the man and his spoiled playboy son. After being subjected to an LSD cocktail and a shipboard orgy, and having slept with the man's son, mistress and the stable boy, she grows disgusted with upper class decadence and descends into prostitution, her cat being her only solace. IMDB