The "your faith will sustain you" sounds so empty now.
You don't need to say anything to your friend, JJ. Just continue what you are doing now, which is making yourself available to her. The ordeals in the recent past can be very wearing to one's faith so, in the meantime, ours will sustain her. I have always believed that spiritual storm jars are much like the temporal ones. If our neighbour's stock of matches have been used up then, we draw to share from ours in order that she could light her candles. So, we continue to pray and have faith that all will be well for your friend and her husband.