Crack in the Mirror

Crack in the Mirror is a 1960 drama film directed by Richard Fleischer. The three principal actors, Orson Welles, Juliette Grco, and Bradford Dillman, play dual roles in two interconnected stories as the participants in two love triangles.

In a rundown Paris dwelling, an angry Hagolin accuses mistress Eponine of seeing a man named Larnier behind his back. In a party at a stately home, meanwhile, prosperous attorney Lamercieres guests include his longtime mistress, Florence, and his young law partner, Claude.Eponine wants to murder Hagolin and attempts to, but fails. Larnier intervenes on her behalf, but merely wanted to gag Hagolin with a scarf before Eponine strangles the man with it. The body is dismembered and dumped, then Eponine is placed under arrest. ........

Source: Wikipedia