Poor Heather Mills.  On top of going through a very public divorce, an organisation that she’s devoted a lot of her time and energy to is kicking her while she’s down;

An animal rights charity has reportedly shelved plans to use photos of Heather Mills McCartney in a new campaign because it does not wish to be linked with the former model.

People For the Ethical Treatment of Animals asked Sir Paul McCartney’s estranged wife to pose naked for a series of adverts for its ‘I’d Rather Go Naked Than Wear Fur’ campaign (1).

But the US-based charity reportedly got cold feet because of her bitter divorce battle with the former Beatle.
Metro, Animal rights group shun Heather, 15th November 2006

With both of the Mrs McCartneys having supported campaigns against medical research whilst benefiting from the fruits of said research, it seems that an overarching hypocrisy is a prerequisite for wives of the former Beatle.
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(1) which Naomi Campbell famously reneged on in 1997.