Thanks for the updated info, and thanks for requesting me.
What that means is that your mother is probably drawing the largest benefit available to her. Her spousal benefit would also be reduced, and she would only be entitled to about 35% of her spouse's benefit.
SO, unfortunately, it doesn't look like there is room there to increase the benefits.
I'm truly sorry
Thank you for your help. Since waiting times at our social security office run into HOURS, this has been most helpful, although not the answer I would have liked for my Mom.
I understand, and I'm truly sorry