J.,
I think right now, until you know more details and especially since they have been quiet on everything too--it would be best just to start by sending a sympathy card with a handwritten note that you are thinking about them at this terribly difficult time. I work as an OB nurse in a doctor's office and the patients who have gone through something like this tell me that the worst part is when people avoid them or don't say anything just because they don't know what to say or do.
Hope that helps.
C.
P.S. I saw that you mentioned you are in marriage counseling...do you like your counselor? If so, who is it, as my hubbie & I are looking for someone in the area as well.