Flintstone, I sympathise with you. I was passionate about learning to fly from childhood. in 1993 I got my PPL and soon after I married a woman who was very afraid so that was an end to my flying. I am now married to a different woman who found out a few years after marriage that I had learned to fly previously so she bought me a surprise trial lesson in 2019................ since then the addiction has come back full force and I'm now working finalising my IR.
I am not in any way suggesting divorce is a solution, I can say however that now in my mid 50's also, I hold a deep sadness that I spent 26 years of my life not flying. In reality I believe I may have 15 years available to me before I'm too old for flying and am very keen to make the most out of that. One of my two kids from my first marriage came flying once with me, he told my daughter "you wouldn't like it" and he has not flown again with me, I know I have to respect this and last thing I want is a passenger going through turmoil but I am quite gutted!
Its not easy but if there is a way of at least communicating what flying means to you and at our age, if there is passion ignited for the next 15 years ..... you probably deserve it, and your family will experience a much better version of you as a person during that time.
You could also temporarily take up cycling, wear super tight spandex (no matter what body shape), an overly wind dynamic luminous helmet, transformer sun glasses and clickety cycle shoes then accompany her everywhere....supermarket, BBQs, family gatherings etc, soon you will be encouraged to buy that Mooney!!
I guess I'm just saying do anything you can to avoid such regrets as I have.