I'm 67, wife is 62, I plan on waiting until I'm 70. My reasoning, I'll have a larger check than my wife, I want to maximize my check that she will get after I die. I'm maximizing my Roth conversions and if I collected now, I would either have to pay tax in a higher tax bracket or reduce the amount I Roth convert.
I expect when I collect, she will also collect. We should be looking at an extra $53,000 a year, leaving us with a very low portfolio withdrawal rate. I hope that $53,000 doesn't get cut in 2032!
Note that your spousal benefit is based on your Primary Insurance Amount (PIA), which is the amount that you receive at your normal retirement age, not age 70, even if you take benefits at 70.
Since you've already passed your normal retirement age, her spousal benefits will not increase if you wait until 70.
See this SS site for details: https://www.ssa.gov/oact/quickcalc/spouse.html