My Mom Is Threatening To Sue Me!

Very long story short… My 90 year old grandmother passed away in December. She left me everything in her estate. Money and personal possessions… no house or car. My mom is pissed and is threatening to sue me, saying that I “stole” her inheritance.

A little backstory. I was the only family that kept up a relationship with her and it was a beautiful one. My grandmother and mother hated each other and my mom knew for along time that she was not included in her will. My mom has a long history of manipulation and abuse toward me and probably counted on bullying me into giving her money (which I had fully intended to do until she started a war with me). I traveled to Canada to be with my grandmother in the hospital after her stoke in November and was with with her holding her hand until she passed late in December. I spent an additional 2 months in Canada settling her affairs as her executor. My mom is a felon and did not attempt to travel to see her before she passed with a special exemption even though I offered to pay her travel expenses. She hadn’t even seen my grandmother for over a decade before her death. On the other hand, my grandmother and I spoke every single day and I traveled to visit her every few months in Canada… birthdays, Mother’s Day, surprise visits… because I loved her. I’m dealing with immense grief as she was my mother figure and closest family. Now ontop of that I’m dealing with my mom’s threats to sue me and spreading rumors that I somehow stole HER inheritance. My attorney in Canada assured me she has no grounds to contest the will but she can try. I think she knows she has no grounds so she is waiting until I get a payout and then planning to sue me even though I doubt she has money to hire a lawyer. I’m not sure what to do with her in this relationship or what to do legally. I have since blocked any form of communication with her as it is all abusive Anybody been through something similar? Any advice? I appreciate it ????????