Forward Planning

This may be a stupid question in that everyone's cancer, treatment and response to that is different. My wife is at stage 4

and is having some palliative care for 3 months, with a prognosis of 12-18 months left. I am trying to think ahead on what to do after that the 3 months of chemo, so we can enjoy our remaining time together, but I have no idea what condition she will be in and her ability to do things or indeed how she will deteriorate. Is there anyone who might wish to share their experience of things they did and the freedoms or otherwise that they had? Many thanks