He committed adultery, therefor, he has forfeited his right legally, and morally to consider himself her husband.
If Michael Schiavo had merely committed an isolated act of adultery, that would not necessarily forfeit all his rights as hisband. But what Michael has in fact done goes far beyond that: he has openly stated his allegiance to a woman other than his wife. In so doing, he renounced the vows that are the basis of his marriage. By what right, then, can he still claim authority as "husband"?
The "authorities", both God and the Government declared them married, and only they have the power to undo it. By what "authority" can you declare his marriage nullified based on your belief that it should be.
Find it for me in scripture or the law. That's all I'm asking.