FY, Yes, her mother's death was the trigger to set her mlc in motion. I'm so sorry to hear what she went through growing up. She had a very painful childhood and it's going to take her a lot of time and space to work on her issues and herself. She will need to forgive herself for the things that she had no control over as a child. Hopefully, she will learn to love herself and come to realize that happiness comes from within and not from external sources and that you can't run/hide from life.
As I mentioned earlier, space, time, unconditional love and compassion are what you can give her right now. Be a friend and when she feels "safe" to talk to you, she will.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.