Arnold Schwarzenegger has revealed he regrets having an affair with his housekeeper, declaring it as 'the stupidest thing' and admitting he 'inflicted tremendous pain' onto his wife and children.

Had it simply been an extra-marital affair, there may have been a chance to save the marriage, but Arnold fathered a child with maid Mildred Beana, who gave birth to their son Joseph 14 years ago.

During the interview, Schwarzenegger said: 'I think it was the stupidest thing I've done in the whole relationship. It was terrible. I inflicted tremendous pain on Maria and unbelievable pain on the kids.'

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