It's really a shame how ignorant people can be. I would have said something about her not being able to be aggressive since she has passed away and fought it. Or, put it in a drawer you go into all the time. Maybe put the picture as your wallpaper and just leave a window open on the computer or shut off the monitor when people are in your office. Sorry, I don't roll over for stupidity so my answers aren't the best ones. You have to do what's best for your position.
Hail Gunther 7-2-2013
If at first you don't succeed, destroy all evidence that you ever tried.
"Some people never end up going crazy...what a truly terrible life they must lead." - Unknown