Does my mum have any hope of surviving the winter?

Mum has congestive heart failure and an ulcer due to diabetics on bottom of foot she has had a triple bypass about 5 years ago. She now had an infection in foot doesnt walk we have to take her to toilet on a steady she is 89 years old has been in hospital numerous times and been on brink of death including with septis and pulled through doctors sorting out antibotics she is breathing fast a lot of times and is now coughing at night and sometimes during the day i am wondering is this fluid building up on her chest and does she have any hope of surviving the winter she talks at night and sometimes says odd things