OK, I realise this thread could be oopen to some severe flaming but I really need some geniune advice and opinion please as I don't know what to do...
Some background (sorry this is quite long):
My sister is the youngest of 3 (I'm middle) and has always been an innocent. By this I mean she's by nature quite a needy person and very much a dreamer. She's very creative and in the last few years has established a brilliant career for herself at which she works very hard. BUT she's always made erm less than sensible decisions, has always had serious money problems and has been involved with a man who was married initially, went on to have a 2nd child with his wife then when the wife eventually chucked him out she let him move in with her. He's a drug addict and has been in and out of prison through all this and is bascilly a total shit although she doesn't see it that way and forgives him anything. Through all this my mum has always been there for her, supporting her financially when 'he' has taken every penny she had and trying to support her emotionally every time he's hurt her. He's recently come out of prison after a long stretch and after 2 weeks announced he didn't want a relationship with her anymore and now he's clean he just wants to enjoy himself (they were planning on getting married and having babies this year and we all thought that finally they might actually make a go of it). Obvously this utterly broke my sister to the point where I had to go and get her and bring her to my house (1.5 hours drive away at 11oclock at night) as I was scared whe would try to kill herself. Anyway, that has all apparently blown over and been forgiven and they have both started counselling but my sister has now turned on my mum saying she's never been supportive of her relationship, has parented her toxically and is to blame for all thats bad in her life. I cannot get my head round how she can forgive this shit of a man anything but seems so so angry with our mum.
Mum is over 70, has had her fair share of trials in her life and has, imo, only ever tried to do her best for all of us.
TBH I think my sister has often manipulated my mum to get what she wants and is now saying my mum is to blame for making things 'too easy' for her.
I love them both so much and it hurts deeply to see them fighting like this. Any advice on what I can/should not do would be welcome.