PT,
Your situation sounds like a big challenge all around... not the least of which is emotional for being so removed with so much going on.
Lord, you know this family....and their needs better'n we do or how to address even our humble prayers to those needs.
Lord, be with John, his wife, the team of doctors, John's mother in law and her doctors, and John's father in law as well. They all need your comfort, blessings and peace, Lord.
Help restore John's wife's faith and strength as only You can do. Make your Will known to them and bring them peace in this time of challenge to Trust on your Will and Plan.
We ask in His mighty name...
Amen.