Hourglass (1995)

Brothers Michael & Jimmy Jardine learn that Dara Jensen's father lost his company to Henry, their father and commited suicide. Aided by Kami, Dara set out to destroy the Jardine's family bussiness and take control of it as her own, which involved framing Michael and disgracing Henry. Dara kills Jimmy but dopped up Michael manages to shove Kami out of a window to her demise far below. Before Michael can kill Dana, the cops burst in and drag him away. Michael eventually gets out of jail (or escapes) and is attending Dana's fashion show where he bursts onto the stage and blows Dana away.(the final shot is one where you make up your own mind)