Cuckoo (1970)

Confined in a dysfunctional marriage, Howard, a domineering, unaffectionate husband buys his unhappy, insecure housewife Evelyn a cuckoo clock; from an antique store where Gloria, a liberated woman works. As their relationship gets tested to the limits; and new attractions arise between Evelyn and Gloria, they discover there is more to the wooden cuckoo than meets the eye.