Here is my input...
The only person who will be able to help her at this moment, is her husband. Her dad is 3rd on the list, but it is a distant 3rd. Her mom is a 2nd, but unless there is history of mom and miscarriages, she will likely not reach out there too much either. She feels like she failed. She is wondering what SHE did that caused it. Even though everyone out there is telling her it's not her fault, she believes it is.
The primary reason that the only one who can make a big difference is the husband, is he is the only one who can tell her, "I lost the child too" Other women who miscarried, (mom too possbily) can say they understand, but they didn't lose
this baby. The husband has the right to say that "it was my child too" and "I lost the child too", unfortunately, no one else can make that statement. That is what my wife needed to hear when we lost ours. Once someone could actually relate, and had equal "stake" in the pregnancy, she started to bring the walls back down, and return to normalcy.
This is what we went through. I hope some of it helps. Best Wishes to all involved.