Monique (film)
Monique is a 1970 drama film directed and written by John Bown.
Monique Sibylla Kay is a French au pair who goes to work for Jean Joan Alcorn and her husband Bill David Sumner. She takes time to care for the children before getting to know husband and wife intimately. Bill soon notices his wife has becomes more sexually aroused. After Bill sleeps with Monique, he comes home one day to discover the two women in bed together.
Source: Wikipedia