Agent of Man Utd star Giggs: This is incredible. I can't believe it
The Mirror says Giggs was said to be so careful that even his agent Harry Swales only found out about the alleged affair when he was contacted by journalists.
He said: "I'm shocked. This is incredible. I can't believe it.
"He's such a family man. I don't know what to say, knowing the closeness of his family."
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