I am very sorry about your loss.
After reading all that everyone has written isn't it great that we are all individuals. Some have to finish one project before starting another, some have many WIP, some have many UFO but I am sure the one consistant thing is we are all full of future ideas. I have one UFO that I started when I was pregnant with our youngest son - he is now 25. I will probably never complete that quilt - that is OK because it reminds me of how far I have come. Grieving is like that there is no right or wrong way to do it. Give yourself time, you will do the right thing for you whether it is completing that quilt or starting something else but above all take care of yourself.