The Times - Letters show how Diana turned to Duke of Edinburgh as marriage counsellor
The Princess found a ready supply of help, not criticism, from her father-in-law as her marriage broke down in the summer of 1992

The Duke’s public pronouncements on marriage have been scarce. Four years earlier, he had observed: “When a man opens the car door for his wife, it’s either a new car or a new wife.”

I love that man.