Short history - my mum has severe mental health issues and is a deeply selfish, over emotional, thoughtless person. She had an affair for a year and dad begged her to end it and stay which she possibly did. Several years on and they're finally calling it a day and getting divorced. They're both in their late sixties.
I went NC with mum about eight months ago which has been bliss for me - best decision ever. My dad has met a new woman and is finally realising that he can have a happy relationship without all the emotional stress, pressure and awfulness that being with mum involved.
My sister is still in contact with both of them and finds it incredibly distressing to have contact with mum, but refuses to consider going NC with her as 'she's my mum' and 'it would be cruel to not let her see her grandchildren.'
Every time she sees her she ends up in such a start - panic attacks etc. it's now having an effect in her own marriage as her husband is losing patience with it all. I don't know how to help her get distance from it, she won't see a counsellor, can't seem to create any boundaries but it's becoming increasingly apparent that she can't cope with the situation, feels caught in the middle of it all and has very strong anxiety problems.
Any suggestions on what she could try or I could do? She's a lovely person and simply isn't able to to let the two of them be distanced from her. They both offload on her, turn up at her house unannounced/uninvited etc. they don't do it with me because I live a bit further away, have made my boundaries abundantly clear and I'm simply not interested in engaging with their issues.