this is a complicated issue and depends specifically on the benefits each has earned.
Please read this article at Vanguard, which walks you through the steps you should take to make this decision.
It might pay for her to take early SS on HER record, and then switch to collecting half of your benefits when you start — and for you to wait until age 70, if possible. Use the calculators at this link!
And be aware that an earlier strategy that allowed the best of both worlds was eliminated for those who reach age 62 after 2015.