My prayers and taught goes out to you and to others who are in similar/worst circumstances.
All I know is, one day WE ALL (living things) will "CEASE TO EXIST" lets all hope and PRAY that, it is peaceful and painless. I know it is not easy to see loved ones in that situation, but it is life cycle, one day we all WILL experience this. I hope your mom and all your family are in PEACE.