Meaning of dreaming of my dead Mother as sitting next to me dead in the dream?

I have done alot of research about dreaming of dead Mother. What if my dreams show I am sitting next to my already deceased Mother? In other words, my Mother is coming to me in my dreams as attached to me with a seatbelt sitting up but I realize she is already dead, a corpse?
This is so morbid. I had alot of hostility towards her when she died. Any interpreters out there?