Arnold Schwarzenegger still hasn't signed his divorce papers to officially end his marriage to Maria Shriver. The Terminator actor's estranged wife Maria Shriver filed for divorce in July 2011 after it emerged he had fathered a son with their housekeeper and though the former couple have reportedly agreed a financial settlement, TMZ reports the 68-year-old star is "dragging his heels" over officially dissolving their union.Schwarzenegger - who has children Katherine, 25, Christina, 23, Patrick,21, and Christopher, 18, with Maria - previously admitted the breakdown of his marriage was his "biggest personal failure" but he is pleased with how things have turned out.He said: "It was my biggest personal failure. We all fall at one time or another and this was a major fall. But I had to get up again because only losers stay down, winners get up."I had to move forward and say, 'OK, now how do I heal and how can I bring everyone together again? Now I am absolutely delighted with my life."And the former Governor of California is thankful his estranged wife has worked with him to ensure he still has a good relationship with their kids.He said: "It has worked out really so well with the help of Maria."My kids are a straight 10. I am so proud of them. I'm so in love with them."..