Object of Obsession

Object of Obsession is an American erotic thriller film, released in 1994, starring Scott Valentine, Erika Anderson, Elizabeth Whitcraft, Robert Keith, Jane A. Rogers, and Jake Higginson. The film was directed by Gregory Dark.

Eventually she leaves but after time, returns to find tapes of previous sexploits with evidence of who her lover really is. After tracing him to his home with wife and kids, Blaze soon finds the tables have been turned. As Magaret plots her revenge, the twists and turns that ensue weave into a shocking conclusion.

Source: Wikipedia