I've changed username and some key details but keeping the gist the same. I'm really keen for people's views as I feel like I don't really know what to do.
Background: 3 sisters, we're all in our thirties now, we had a fairly shit time if it as kids my mum was an alcoholic and had mental health issues- over the years we've had fairly little contact with them but never completely lost touch.
At Christmas, my youngest sister who lives in America told us that she was getting married and no one was invited. This sparked a few minor arguments, but we all accepted it and nothing too bad was said... From this though youngest sister sent me a lot of messages saying that she felt I didn't value her and that I had forgotten her birthday once and she thought that my attitude over the last few years had made her feel like shit. I was shocked but kind of accepted that was the way she felt. I am quite loud and boisterous and I know that isn't for everyone. I always assumed she was confident and could deal with me but as it seems it wasn't the case I apologized completely said I had no idea and that I would be really keen to rebuild our relationship and make amends. She said yes if I start to treat her with respect that could happen.
I have since had my first baby, so have made a real effort given her and her husbands distance from us to keep in touch, send photos of my daughter and ask how they are doing. I get one or two word responses. When they got married they sent me a picture of the marriage cert!!! I asked for a picture of them to no avail. Anyway recently all went quiet. I heard from middle sister that sister 3 was taking a break from social media so I sent a message saying we loved her and hoped to hear from her soon. It hurt a bit because we've had a hard time with new daughter, been in and out of hospital, had operations etc. and if she wanted to rebuild I thought she might at least ask about DD. Anyway.
Sibling 3 sent a horrendous message to my mum, (I know alcoholic and mental health issues aren't easy to get over but) it was vitriolic, but also terrifying to read, it sounds like she's really mentally ill. Anger, shame and self hatred seeped through the message. It named everyone in the family and said she didn't want contact with any of us. That we don't get to explain or apologize anymore. It commented that she needed to access healthcare in the US and couldn't.
Because she seemed so adamant that she wanted no contact and I was worried about her I sent a message to her husband asking if he thought it was appropriate to pass on our love and to reiterate that the feelings she was having that we all hate her are unfounded. I got a message back saying he was really busy, there's plenty of time to talk in the future and they would appreciate it if I didn't message.
What to do? Bear in mind her main issues were with out mother, our disagreements have been really minor and the sort of thing I think sisters get over... I really want to help/send them money or something to pay for healthcare... but I'm stuck because given the dramatic nature of the message to my mum I don't want to keep pushing her in case I do more damage.
Oh this is so long. Sorry. I hope some of it makes sense.