BLAINE Trump has finally called it a day on her marriage of 24 years. On Wednesday, the gorgeous blond philanthropist filed for divorce from Robert Trump, The Donald’s brother, after all hopes of reconciliation faded. A friend said, “Robert has been openly living on Long Island with another woman for the past two years. He walked out on her, but, even so, she had hoped for a reconciliation. It just wasn’t to be.” Blaine is hoping for an amicable settlement. “There is a good chance they will be able to reach an agreement without going through a Donald Trump-like divorce, which would drag through not only a courtroom but gossip columns. She just wants to get on with her life.” Blaine, who has hired high-powered divorce attorney Robert S. Cohen to represent her, and Robert have no children. She has one son, Christopher, from a previous marriage. A rep declined comment.