My mum thinks my sisters psychologist is poisoning her mind
My 19 year old sister has recently started seeing a psychologist and she went for her first visit a few days ago. My mum came over for a visit and has become paranoid because apparently she thinks my sister is acting different around her and doesn't want to talk or hang out with her anymore. She started asking my sister a lot of questions about the psychologist visit and was asking what she said about her to the psychologist.
My sister obviously wasn't comfortable telling her much and tried to brush her off, but now my mum is obsessed and paranoid and thinks the psychologist has somehow poisoned my sisters mind and has turned my sister against her. My mum has a lot of mental issues like bpd and bipolar and has abused both me and my sister in the past as children. I feel like my mum is just scared about the truth that she's a horrible person and mother and the psychologist is helping my sister see that and helping her work through her trauma, but my mum is scared of that happening.