Dear mcozire,
I experienced some similar things,and the way i delt with it is exactly the faith You mentioned. I prayed a lot,and i trusted all will be well. What i have noticed is,it is very important that that person believes he/see will be healed. I think that nothing is impossible with faith and trust,and most important,with God. I truly believe that. Miracles are possible,absolutely everything. His power is something which we can hardly understand. I also believe,all is His will only! And only by His Grace!
Prayer can help a lot,and deep and pure faith. I witnessed that in my family too,and on my own example,so many miracles. With God by our side,we can move mountains. Like Jesus Himself said. Such is His Glory!
So,whenever You can,talk with Your aunt not to lose faith. She must trust she can live,that is very important. Not to give up,NEVER to give up! She must believe in that! Talk to her whenever You can,persuade her she will be good. Our true nature is the Self only,And what we believe is very much important. In the end,it will happen what is best for her,and everybody. That is the beautiful law of nature,beautiful and merciful nature of God. He knows best.
Truly,Faith is so powerful. It never,never never turned Its back upon me. We are all Divine,and all power is in us and God only. We only need to trust. Truly,is there is anything impossible for God!!!
Whatever is needed to happen will happen. We only must be aware that nothing is as it seems,and all is for our good. This life is just a stage,and what we truly are can never die. What we are is Eternity.
I delt with losses in this way. I missed them,but deep in my heart i know,they live always and truly,and they are never far from me,but in my very heart. There is no distance whatsoever.
May Bhagavan's Grace be upon Your aunt and Your family,May His Love and Grace give her strength and courage to win this battle!
With Love and prayers,