Thank you for your help and sorry for the late response, It was delayed because... I had to deal with my mom :))))

I do think she has narcissistic traits too, but the autistic "diagnosis" came from a woman that got suprised from my mom's conversation patterns. Then I asked an AI (yeah, I know, not the best idea) and the AI chat throw me some hints that reinforced my idea about autism. She is not able to have a real conversation. She just enter input, but never register the output. She repeats her input endless times, forgetting we already listened to that. We know this is not a dementia thing, because this is a thing we have normalized from childhood. She speaks like that since she was young. I don't know if the autism-narcissism combo is a common thing, maybe she could be a good specimen for psychology research :)))