I don't know.
Here are some links
<a rel="nofollow" target="_blank" href="
https://www.schwab.com/resource-center/insights/content/yes-there-are-retirement-benefits-for-a-non-...>
<a rel="nofollow" target="_blank" href="
https://www.ssa.gov/planners/retire/yourspouse.html">https://www.ssa.gov/planners/retire/yourspouse....>
I just skimmed them, but it appears that if you wait until you are both at full retirement age, your spouse gets a benefit equal to 50% of your benefit (so together, you get 150% of your benefit). But if either of you file early, the benefits are reduced (but you get them for longer, so it may still be to your long term advantage).
As I said, this really needs help from a financial planner who specializes in retirement.
