I would not be surprised if they insisted on “imputed” voting for her corpse, like they did during Bush-Bore, where the intention of votes could be interpreted.
At this point, the court is solidly conservative. IF Thomas recovers, they’ll put in someone his equal.
So, really makes no sense to have this poor lady suffer. Let her retire. Her vote doesn’t matter anymore. IT really doesn’t and in fact you might get the rest of them to vote with some maturity now.