He didn't have to defend her, all he or even his management company had to do was ask that she be left in privacy instead of the Ant and Anne Marie loved up arranged pap shots versus the clearly unarranged pap shots of Lisa.
And considering he is a well known celebrity and will have known this second wedding was not a quiet simple affair but full on showbiz plastered across the papers and also knowing the papers would be going after Lisa, then yes he should have had the common decency to have her informed privately about the date.
The Dan Wootton article most definitely proves that point beyond all reasonable doubt and he, his management company and Dan Wootton should all be ashamed of themselves for allowing that piece to be printed.
They may not have had kids but they were together since 1994, his own words below
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I hope as much as anyone else he is happy and healthy but your happiness shouldn't depend on dragging other people down, or allowing your management company to do it for you to make yourself appear better.