Article continues below advertisementNicole Kidman and Keith Urban's marital woes were not only a shock to their fans but also to their friends, as the A Family Affair actress kept her separation and troubles leading up to it a secret from her loved ones.In a new interview, a source close to Kidman revealed why she hid her split from Urban for several months before news of their breakup hit headlines on Tuesday, September 29.Article continues below advertisementNicole Kidman Tried to Save Her MarriageSource: megaNicole Kidman tried to save her marriage before filing for a divorce.