I don’t believe the GPO applies in this case. It does not apply to the survivor annuitant unless she was also employed by the Federal government and earned a civil service pension. Otherwise she is entitled to all the benefits under SS and the CSRS annuity. OP said Auntie never worked outside the home. Therefore SHE never worked for the Federal Government. If you look at SSA Pub 05-10007, http://www.socialsecurity.gov/pubs/10007.html#a0=3
, and refer to the link that says “When won’t my Social Security benefits be reduced”, it says
“Generally, your Social Security benefits as a spouse, widow or widower will not be reduced if you:
· Are receiving a government pension that is not based on your earnings
The survivors government pension she receives is based on her husband’s earnings, not hers.