I agree with this. I find it really problematic the friends being blamed, they tried to get her help with calling the ambulance which was refused.
They had their own lives that they needed and wanted to get home to. Mum needs to start looking at herself if she really needs someone to blame, where was she, and how did this all begin?
Although at the end of the day, there is no blame to be placed on anyone else. Caroline made her own choice, as difficult as that may be to understand. Her life, her choice to end it. I would always recommend a call to The Samaritans if you are feeling that way, they can help you through the moment, or at the least just sit and listen to how you feel