Girl power: The movie is released in the UK on April 23 and will be hitting US cinemas on April 25. (Screenshot from The Other Woman movie) The star of The Other Woman, a film about fidelity, claimed it was almost impossible for couples to stay married for life. Cameron, 41, said: “We can have all of these girlfriends, all of these friendships. I know with my girlfriends I do totally different things...