In the UK a few years ago it was quite common for wives, girlfriends and mistresses to do 'the dead man's course' which was about 5 hours designed to allow them to take the controls and put it on the ground with no injury should the driver become incapacitated. Normally this was undertaken by an FI although a few people did teach their own partners.
Sadly my partner decided nothing less than a full license would do. This is not to be recommended. Nowadays I spend more time in the left hand seat paying the bills than I do driving!