Der Weibsteufel (2000)

A seasoned smuggler and fence manipulates his young wife to gain information from a newly appointed border policeman. She uses her allure to seduce him, and the husband's plan appears to succeed. However, the wife develops genuine feelings for the policeman, who awakens desires she had suppressed. When she discovers he exploited her for information, and he realizes he manipulated her, their entanglement spirals into irreversible consequences.