"Once again my errors have compounded and rebounded and also inadvertently impacted on the man I admire most in the world, the duke.
"He has supported me and come to my rescue again and again and there is absolutely nothing that I would not do for him. This make it even more painful for me that what happened has been used by people to make his life more difficult."
The duchess added: "I would throw myself under a bus for him. It is in times of difficulty that character shows itself. I am fiery Irish redhead and I am to remain strong, fight strong and try to do what is right.
"The duke is a man who does not know how to tell an untruth or behave dishonourably. There have been errors of judgment but nothing substantive has been done wrong by him, ever.
"I am not going to stand back and let him take any more abuse from any suggestion or implications of impropriety. It is so wrong.
"He is a first-rate father; he's a first-rate man, the finest that I know. I will not have his name tarnished by me yet again. Look at all that he has done for the country. He works tirelessly."