Woah!! All of you blaming this lady for being a partner in crime!! Stop. I can tell you. In 1979 my dad had a stroke which paralysed him on his right side. He was only 56 and still working. He fought back and insisted on driving again, but he should not have, because when he changed gear there was no control and he refused to have a modified vehicle as "there was nothing wrong with him". My poor mum feared for her life, but didn't drive herself. I was their only child and lived 40 miles away. She wrote me a heartfelt letter begging for help as she simply wasn't strong enough to stop him, emotionallyor physically. We swung into action getting advice and even called the police to discuss it. They were not interested, as they couldn't act unless he hurt someone!! In the end my only way forward was for me to report him to the DVLA. Can you even imagine how I felt? The DVLA asked him to go for a medical and he knew finally that the chips were down. He tearfully handed the keys of his car to me, which made me feel 50 times worse than I already did, as he never knew until his death that it was ME who "shopped" him. Yes, I don't need to be told I saved lives, including theirs, and I did the "right thing" but it doesn't mean for one minute this wasn't one of the hardest things I ever had to do in my life. In sectet. I effectively took my dad's life away anyway. Please don't put the blame on this lady as some kind of "accessory" as it is devastatingly difficult to get a good outcome without being emotionally drained in the process. We all know what we "should" do but try living with the consequences. Not all men will admit to the time being right to give up and will fight you to the death.
The police don't want to know and there is no support out there. So have a heart!