<human>: Ok, throwaway, and some details aren't accurate to be as anon a possible.

My sister is due to give birth imminently (her due date is within the week). I just heard that her husbands father died last night out of the blue. Obviously he needs to be with his family so they've driven several hours to his home town to be there. 

I'm really worried she might go into labour on the highway away from the hospital/doctors etc that she knows, but also I want to support them both as much as possible but I see the need for them to be where they need to be at the moment.

Clearly it's going to a bittersweet and highly stressful situation, having a baby soon and them dealing with the grief of the sudden and totally unexpected death of his father.

I feel like I should be doing something, but I'm not sure what's going to be helpful, both in the short term and ongoing. 

I live quite close to them (but they are currently about 7 hours away) so I want to be there for them (I did anyway, helping out with their first child), but also they're going to need space so I don't want to overwhelm.

I've seen some really awesome people on this sub, so I'm just reaching out as this is a completely unexpected and unknown situation for me and I'm not sure what I need to be doing.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Brother-in-law's father has died days unexpectedly before their first child is due, not sure how to deal with & be supportive.