It sounds like she really needs an outlet for her feelings on this and has chosen you to be that outlet, which obviously doesn't work. Does she have other people in her life she can go to instead? I would try to direct her there. Would she maybe by herself want to talk to a professional about this? Or maybe attend an appointment with you so she can interact with your p/tdoc and maybe also hear it from a professional that you can't be her outlet for this. I know that my husband seemed to feel a lot better after meeting my pdoc and talking to her at a few of my appointments.