The mother in this case may not be a JW.
sf,
In several of those cases, the parents have objected because the use of blood is shunned by their religion.
The parents often have been Jehovah's Witnesses, whose beliefs include abstaining from blood, including transfusions, based on a literal translation of the Bible.
You highlighted the section about the parents and implied disfellowhipping. The article is not saying anything about this particular parent, only that in most cases where judges have had to rule on this issue, that the parents in those cases have often been Jehovah's Witnesses. (In fact, I believe they all have been JWs with the possible exception that they were too new to be baptized, or were, in fact, recently disfellowshipped, or loosely associated through a spouse or perhaps raised in the religion as children but no longer associated.)
There will be a PR advantage to the Society if this case can be used as proof that they are not the only people refusing blood on religious grounds. This idea is already being leveraged on another JW discussion site which quotes a news source: "While Jehovah's Witnesses are one example of religions that discourage blood transfusions, the mother named in the Omaha lawsuit is not a Jehovah's Witness. Thursday, a judge will hear both sides of the case and a decision will be made whether the hospital should proceed with the surgery."
If I turn on my "mystery-novel-plot-creation device" I could also speculate about a scenario that won't work for the JWs PR Dept:
What if she isn't a JW, has no interest in JWs, isn't even religious, but is just using the idea as a means of giving up a potentially unwanted baby that is even more unwanted now that the baby has a serious life-threatening heart defect? It would be strange, but the world is full of strange people. Someone in my old congregation, for example, supposedly got her doctor to help her "miscarry" her child who was to be born with Down's Syndrome. That's awful on so many levels I always hoped the rumor wasn't true, but most of the congregation believed it. She was the PO's wife and was therefore never really questioned.
Gamaliel