Not sure what the reasoning is there. Does she mean this?
She was 90, though parts of her were considerably younger.
“She went on to hold a string of secretarial jobs — 17 by her own count — and discovered the measure of security that sex could bring. At every office, or so it seemed, there were bosses eager to fondle and dandle. In exchange, there might be a fur or an apartment or the wherewithal to keep her family going a little longer.”