He gained that authority by marrying her. That he subsequently committed adultery is not relevant as a legal matter to his legal authority to make medical decisions when she is incapacitated. I don't have to agree with his decision to accept that he had that right.
You'are not only disingenuous, you're dishonest. I never said nor implied that I was "comfortable with putting this woman to death," but if it makes you feel better to falsely accuse other people, have at it. It only demonstrates how pathetic you are.
If he had that authority, why did he need hearsay evidence to establish her wishes?
Skip the insults and try answering the question.