Marriages between filmmakers are tinderboxes. They’re never long for this world, especially if the husband is a director-screenwriter-producer and the wife is an actress, and double especially when they make films together. Jointly-created films are like children, and if the film fails to ignite commercially and/or boost the career of the wife, the parents will start to blame themselves. Most talented actresses are intensely ambitious and no day at the beach to begin with, and this will only intensify if you put them in a movie that doesn’t take off or make them seem as mesmerizing or pistol-hot or Meryl Streep-ish as they feel is their due. It becomes even worse, obviously, if the husband has an issue or two of his own, which is not unusual among director-writer-producers. On top of which infidelity is so easy on that level.