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If you spouse applied for her benefits at 62 she permanently reduced her own but also her spousal benefits by about 30%. Only one spouse can collect spousal benefits, but the social security doesn't state that both spouses cannot collect spousal benefits at different times. If her spousal benefits are higher than her own, the social security should automatically switch her to the highest benefits available to her own, or the spousal. Her spousal benefits would be about 32% of what you were eligible for at 65 (your full retirement age).
Because she applied for her benefits at 62. By applying early, she permanently reduced her own but also all future benefits available to her.
Here's spousal benefits calculator: https://www.ssa.gov/OACT/quickcalc/spouse.html#calculator