My db has been with girlfriend for a couple of years. They both late 30’s with good incomes and no family. My mum is lovely ( I know I’m biased) but would do anything for anyone to get on and would never interfere. My mum has always got on really well with my brother until recent times and I have a feeling that his girlfriend is driving a wedge. My brothers girlfriend had a unhappy childhood whereas as I think our childhood was pretty great. My brothers girlfriend has told my mum in confidence that my brother hated his childhood and told her that he hated my mum’s overprotectiveness. This is all news to her and is deeply upset her know this. She has also said to my mum that my brother doesn’t like her visiting their home. My mum doesn’t want to rock the boat but I’m so upset and want to ask him why she would say these things. My brother’s girlfriend can be very sweet to my mum when everyone is around which makes it worse. My brother seems to be distancing himself from all of us so I’m wondering if I should just keep out and accept he has made his choice?