Working on me and letting it play out

[cbtdad]

So on top of the stress of paramedic school and our son looking like he will be diagnosed with ADD. My MIL has lung cancer.
She lives 8 hours away. My W is her medical power of attorney and has dealt with a lot between her sisters. Even though her sisters live where their mom does she doesn't speak to them
they all had a fallen out about 4 years ago over money.
Well she just sent me a screen shot of a text her brother sent her about how bad her mother is doing lately and that she is getting a lot weaker quickly. I know this is going to put an unbearable amount of stress on my W.
I responded to the text, "that [censored]. I'm so sorry. How are you feeling?"
So all I can do is try and be there for her and not add to the stress. That's the game plan
I just know that something like this can really effect a marriage, much less a marriage that is struggling at the moment