Re: How do I help my sister after her husband suddenly left?
It hurts to see those we love in pain. Just remember that it feels like the end of the world for her. She also has to have time to mourn this, just like a death, which it is. The very best thing you can do is LISTEN to her and acknowledge her feelings....when she says she has nothing to live for, don't correct her. Tell her you surely understand how she could feel this way and that you too might feel the same under the same circumstances.
This isn't her focus right now but in time she needs to move forward and reinvent her own life. You can't force someone to return or to love you but you can become a new and better person yourself, and this is what will be good for her to focus on soon.