My sister has faith, let me tell you a small testimony of my father. He has heart problems as well, so one day my dad was getting sick. We thought he had the flu, but that was not the case, and my dad didn't want to go to the hospital. This went on for about 2 days, and then one day when we got home from the youth group, my dad looked bad. Then we didn't even listen to my dad; we just called 911. They came, took my dad, and my family and me just started praying for my dad. When my dad reached the hospital, they found out my dad had a heart attack. Doctors were shocked how he could be alive; it was not possible because 99% of his heart wasn't working. My sister, at this point, I saw if God doesn't hold, no one can. He was in the hands of our mighty Lord. My dad had open heart surgery, and right now, he is home and continuing his life.
My sister, just trust in the Lord, hand your mother to Jesus. Jesus loves you and your family; he will take care of your pain. Just be obedient and accept his love. All things are possible through the Lord. Praise be Jesus in Jesus' name, amen!