Mother harassing me about grandparents’ estate

My mom has had severe depression since I can remember. She is also an alcoholic, and I believe she may have borderline personality disorder. My grandparents made me their power of attorney and executrix and split up their state so that my mother only receives a portion. My brother and I also receive a portion and so does my cousin. The reason my grandparents made me their poa and executrix is because my uncle passed away and they did not believe my mother was stable enough to handle the responsibility, among other reasons. My mother was present when all of the paperwork for the last will and testament was signed, including the power of attorney. I have an attorney to handle the estate, but I am unsure how to deal with the harassment that I am receiving from my mother. She has resented me for a long time for various reasons. This be one of them. She is been harassing me by text message recently concerning the estate and her portion. She has been harassing me like that for years, but this time she is threatening to sue me. She is been harassing me by text message recently concerning the estate and her portion. She has been harassing me like that for years but this time she is threatening to sue me. Even though she was there when it was signed, she is claiming that I took my grandmother to the attorney and had her change the distributions. I know all of her accusations are false, but I really feel like I need an attorney to help and when I brought it up to the estate attorney, he really didn’t seem to know how to help me. I know all of her accusations are false, but I really feel like I need an attorney to help and when I brought it up to the estate attorney, he really didn’t seem to know how to help me. There is obviously a lot more to the story, but primarily I am concerned about the harassment. She also has some of my grandparents things still because she was helping me go through everything. She also has some of my grandparents things still because she was helping me go through everything. She has all of the jewelry and I am concerned about getting it back from her.