Sarah's husband had been ill for many, many years and was wheelchair bound. I seriously doubt he was ever able to get a life insurance policy. He also has children and I would suspect the bulk of any thing he has would go to them.
I don't think people are sending money as a way to support her, but rather as a tangible and practical token of their thoughts from all over the world. Flowers die but a few $'s here and there might buy her a nice night out, a mani/pedi, a book, movie, etc. and give her some glimpse of joy in an otherwise horrific period in her life. She's also thousands of miles from her family and it could help with plane tickets, hotel rooms, time taken off work....
As with all donations, if you don't want to donate, don't
