Don't let her drive...
Seriously, I have the same problem at 6ft 5 and 5ft 2 respectively. At least we have the two memory positions available which helps, just not with the time to adjust, unfortunately. She likes driving mine but prefers driving her Renegade, so we normally drive in our respective cars, whichever we happen to be using at the time. I know not everyone has that option, though.
No other solution that I'm aware of, sadly.
Alan