May she rest with peace. I too lost my mother a few years back. I remember as a child, just the mere thought of her passing brought a heavy feeling of sorrow in my mind and heart. I wasn't to worried of anyone else passing back then, to be honest it was my greatest fear in this world! Some pretty f'd up mess happened to me in my childhood so my Mother I held closer than any other.
When I was growing up, she would be sick on and off. I was at home with her when her Mother had passed away. The things that happened to me ,coupled with not wanting to risk not being at home had she became really sick made it tough to go to school as a youth. I always needed to be by her side. Long story short, well... the worst thing that I could fathom had came up, it was tough more so because I was on my way to the Hospital when my sis called saying she expired...
I am sorry to post a drawn out sympathy, but for some reason I felt I had to. It is somewhat therapeutical. Hopefully for you as well. Sometimes just getting the words out your head and onto paper helps a bunch.
I will just wrap it up by saying I am sorry for your loss. I hope you and your family will find peace of mind and comfort knowing that she is at rest.
God speed your healing in these tough times.