You just have to be there for her, sometimes telling her the obvious things such as you'll help etc.
Crikey has it spot on.
There can be a lot of awkward silences and such like, however, sometimes plain speaking and honesty about the situation makes for the awkwardness to go away and conversation to open up.
Very much a take it as it comes thing.
Dont know the background to it all, but Last word of advice / warning in such scenarios … people can flip and change states of emotion VERY quickly and say and blurt things which at the time may seem odd/hurtful/whatever … just let folk say their piece and move on. Or if you do have to challenge it, dont rise to getting into a full blown arguement, but soak it up and politely say you're bit and move on.
Its one of life's experiences, try not to stress too much about it all, and once fate has dealt its hand, take stock do what needs done , and move on.