One thing these parents knew when they proceeded with the pregnancy with their youngest child is that they would love it with all of their hearts. The fact they took advantage of medical technology to possibly do something wonderful for their older child has nothing to do with the fact the youngest is wanted and loved, regardless of the outcome. If the youngest baby were actually older than the child with thalassemia, and told it could possibly change it's siblings life, it would feel blessed and honored.
Whether one is Catholic, Christian, Mormon, or a religion of one, we know one thing God commanded was to love one another. This baby was born to love, and will have some wonderful tales of it's beginning for the grandkids!!!!!! What other explanation could there be for this family to endure all of this than LOVE!!!!!