This is just flat out stupid.
What's stupid about it?
Well, this IS what is coming. Count on it. Among other things.
Stupid, but predicted.
It sure does the job of distracting attention from the core legal issue of the Schiavo case, which is to get to the bottom of the patient's wishes. Our spouses can't make us take or refuse medical treatment on their say so. And in a case where somebody is incapacitated, the question regarding stopping food and water is answered by trying to discern the patient's wishes, not their spouses wishes.
It could be that an unfaithful spouse actually has good (maybe even the best) evidence regarding the patient's wishes.