Here is just a little of what she said over on her blog:
Right now many people are asking why my Jacob died. They want autopsy results to reveal the "problem". They want reasons. Inconclusive is not good enough. I understand that. But, for me, it is more precious that it is a mystery to us. I believe with all of my heart that God took him - much like Enoch. God walked beside him and delighted in him. And, on February 5th, 2013 at 2:00pm, it was time for him to go home - to walk with God.
Jake's work here was completed.
He had accomplished all that God had intended for him.And what she wrote after that will take your breath away. She is a precious, precious woman, and I am completely confident that her obedience to the Lord in this time will be greatly rewarded in Heaven. She does love Him whole-heartedly, and she willingly takes the bad with the good because it is from her Father whom she trusts with all of her heart.