Much condolences Martin my friend.
I can kind of relate, I had an aunt I was very close to pass away in a similar fashion. She had a long battle with cancer and also had to have fluid drained from her lungs. In her case the procedure actually gave her an extra year or so of life, but eventually she succumbed. That was about a year ago now and it hit me pretty hard.
All you can do is cherish the memories and maybe try to do her proud once in a while in your own life.
As for the GFY post, this board is just like any other message board, as in the regulars are going to eventually come to feel like they can commiserate with the group from time to time. I wouldn't give it a second thought.