You have my heartfelt sympathy as well, Kezia.
I spent last summer with my lovely sister( who had reached the point of no return due to breast cancer) and had the same dilemma as you when the end was approaching in early October. I talked to her every day on the phone (I live in Malta, she was in Kent) and we agreed to remember each other from when we said goodbye.
She died on 10th October and I did wonder whether I had done the right thing. It's always going to be a tough decision, but I think you did the right thing.
Sincere sympathy, again, on your sad loss 