Chuzhie tayny (2007)

An outwardly happy family hides a dark secret in this tense thriller. Although the husband loves his wife, he cannot help betraying her with his casual affairs, however, his recent infidelity proves to be his last when a strange and mysterious woman gradually tricks her way into his life. When he refuses to make her his permanent mistress, she starts pursuing him and embarks on a mission of revenge against him and his innocent family with devastating consequences.