I don’t think Mrs. O has any the energy or desire to be saddled with the detritus from 3+ years of utter failure. Notwithstanding that she wouldn’t have to do anything except jet-set, her personality disorders would preclude her occupying that office, plus, you know, shiftless.
She paid her dues with 8 years of her prime being spent in the White House and was rewarded with hundreds of millions of dollars for doing so. No way she gives up her perfect life to go live in DC and actually have to show up to pretend to work.