My Mother is a most definitely a narcissist. We've had problems for years and have the pattern of getting on for a few weeks then having a disagreement. Recently my Sister (she is 34 and single) has had a benign Brain rumour removed. She is recovering and doing well after 5 years of severe depression which has alleviated since having op. My Mother however is in martyr mode, she is worn out from the last few years and cannot cope she says. My sister has been living with her the last 2 months. My Dad cares for his Mum and lives with her. I have my DH and 2 autistic children. Sister and Mother stayed with me over Christmas, sister stayed longer as did not want to go back to Mums. Apparently Mum went to hit her one day. Sister was vile to Mum day after op so Mum was equally vile back. I was appalled at the contempt I saw between them and the lack of care and compassion my Mum showed. She didn't help my sister manage her medication or comfort her when she was pacing at night, unable to sleep. My Mum has lived alone for 10 years and has severe OCD. My sister is severely restricted in where she can go in house, when she can have shower, not allowed heating on too long- the list goes on. When my sister went back to Mums, an hour's drive away my Dad came to get her, Mum ordered that sister was fed and to stay with Dad as she would be out until 6. She was seeing a guy she occasionally sees. In the argument I had with my Mum recently when I said that I didn't feel welcome in the family home she said that the children need more discipline and I allow them to jump on furniture etc and it is too much for her to have my family of four there. I just feel so angry with her over the treatment of my Sister and for this comment. I want her to fuck off to the other side of fuck not apologise!!! AIBU?