I think if you have a girl or even guy friend who is getting abused in a relationship, you should do something about it. You will know it in their demeanor, choice of words as time passes, physical marks, etc; you will know.  Dont simply be a witness and dismiss it saying 'it's not my place', 'oh she knows what shes doing'. Etc.  Dont make excuses. This lady died cuz she didn't have real friends who stood up for her. Yeah she made the right move by initiating the divorce but its too late now... shes passed away. Do whatever you can to save your friend...... or not. Up to you.