On the rocks for probably a good 7+ years. Sex still happens, I’d estimate on average 2-3 times per month.Hi MrL. Welcome to the forum.
How many years has it been on the rocks? On the rocks means what, once a quarter, once a year, or sexless for years?
In those years, has there been any interest on her part in discovering the root cause, whether it be medical or psychological? Has she been treated for anything else, and this could be a side effect? Any childhood traumas that you've heard whispers of that are now bubbling to the surface?
I think that depends on the people involved. There are a lot of moving parts to look at.
It sounds like she’s given you years' worth of excuses/lies to not be sexually intimate, so trust has been eroded. Any chance she’s having an affair, emotional or physical, already? I know of a few cases here on the forum where poly was introduced to cover an ongoing affair.
Not sure about divorce, but the old marriage would be over and something new would be built in its place. The marriage would be dead and gone.
Did she give an example of how she thought that would happen? Once resources (time, energy, money) start being diverted away from her or the marriage/household, she might change her mind on that.
Discovering the root cause? No, not even close. Usually when I bring up the subject it ends in an argument and nothing constructive happens. She feels like this is my only concern in life.
Affair? I’m almost certain no…..but you never know. I’m currently looking at asexuality as a strong possibility. If this turns out to be the way she now is, EVERYTHING would start to make a lot more sense.