Just asking, I don't know anything about FL. law (hell, after all this, I realize I don't know the Law at all)..
The marriage is irrelevant. The relevant question is whether Terri would choose to stop food and water intake, if she was able to make the decision. The court has ruled (wrongly, IMO), based on testimonial evidence, that these are Terri's wishes. He husband testified, but so did at least 4 others. Her husband, Michael, Michael's brother, Scott, and Scott's wife all testified that Terri had seen her grandmother hooked up to machinery, dying, and said "I don't want to die like that." Terri's mother, and siblings, and IIRC, at least one friend testified that they never heard Terri express a wish for DNR, and in fact, had on occasion expressed outrage that Karen Ann Quinlan was forced off a respirator. The SChiavo's testimony was ruled "clear and convincing," and the results are playing out on a national stage.