In 1998 Deng met Murdoch, who was then married to his second wife, however that stopped neither of them and they married a year later.
The couple have two children Grace Helen Murdoch, nine, and Chloe Murdoch, six.
The affection Murdoch holds for Deng, the Telegraph reports, would have only been enhanced by her defence of him yesterday.
From the moment she entered the Wilson Room, the Daily Telegraph's Stephen Adams writes, it was as though "she too was in the hot seat".
Adams notes Deng was not there " to do nothing but stand by her man".
As tensions increased under questioning from Labour's Tom Watson, Murdoch nerves began to tell, banging harder on the table as he defended himself.
Deng was seen to tap her husband on the shoulder several times, Adams says was "a soft reminder that he should remember himself".
And when Marbles lunged at the media mogul with plate of shaving cream, Deng was the first to her husband's defence, reacting before police or Murdoch's son James, who was sitting next to his father.
Deng slapped Marbles away with an open hand, and then attempted to turn the foam on the attacker.
One of the committee was later heard to say "don't get in the way of Wendi Deng", the Telegraph reported, while Watson told Murdoch "your wife has a very good left hook".
- NZ Herald staff