I don't know what state you live in, but there is highly unlikely a provision for lifetime alimony for a woman age 36. That just doesn't happen. Worst case would be "rehabilitative alimony" for a period of time in which she would be ordered by the court to obtain a marketable skill, going back to school if necessary.
Secondly, you cannot make an independent financial plan in a marriage. You have a goal to be retired at 45, but you changed your plan and increased your risk exposure when you a) married and b) agreed that she not work without a pre-nup or post-nup, since your highly aggressive retirement plan requires all hands on deck.
I might add, your highly aggressive retirement plan is not likely to take place without statistically unusual earnings and planning, so you need a qualified financial planner to work with you as a couple. You can't implement such as plan without the full cooperation of your default legal financial partner, so if you are keeping all the money issues to yourself, you're doing it wrong. This dream needs to be a shared dream, especially since there are no kids to look after you, or her when she does get too old to work.
I have rapidly bored of this conversation, but yes I would likely be on the hook for lifetime alimony in SC and I don’t have an independent financial plan in marriage. This retirement plan has been the goal for the last 6 years of our marriage (in which my income has gone from $40k/yr at marriage to > $300k in the last few years) but my could change her mind at any time and kill it from my side. And yes you are discussing all coulda-woulda - thats the point - the financial incentive favor women in divorce, period, end of story. There are exceptions, but those prove the rule. Enjoy running marriage into the ground further - because the current divorce rules are the largest part of it.