K.,
This can turn out well. I have known two people that this happened to and both gave birth to babies who ended up fine in the end. It's a long uphill battle, however. Infection is one of the biggest concerns now because the bag of waters is key to stopping that. She will probably spend the remainder of her pregnancy on bedrest and there is a very strong chance that she will finish her pregnancy in the hospital. If she is there a couple of weeks or a couple of months, I am sure she will appreciate your visits, calls and emails and gifts or loans like books, magazines, CDs and other time fillers.
What they usually do is just take the babies as soon as they are old enough to have a good chance at survival: 28-30 weeks. They start steroid treatments to speed up the babies lung development. They can give mom antibiotics to stop infection. Most likely she will have c-sections.
Here is a website that clearly explains the chances of survival based on how many weeks along the mom is...
http://www.spensershope.org/chances_for_survival.htm
There are other links to the website your friend might find helpful - emotional support and NICU information.
After the babies are born, they usually stay in the hospital for several weeks. Doctors say to expect them to be released about the time of their real due date, but most babies beat that timeline.
Hopefully your friend has good medical insurance. One of the people I knew in this situation didn't. She had to be life flighted to the hospital and stay there for over two months and the baby stayed for another 2 months. The bill was well over $1 million. I am not a big believer in government handouts, but this is a situation where it was well warranted. There are medicare programs and other government helps if this is her situation.
Have hope. These things can turn out well. Good wishes and prayers always help in these situations. I hope things turn out very well for your friend.
S.