There's good chance that she won't receive any RFE.
On the other hand, she is out of status as soon as she divorces her hu*****and. It's a gray area. If INS doesn't find out that, it's ok for her to stay.
Why does she want take the risk? Try to stay in marriage until she gets GC.
I feel sad for her and her hu*****and. I guess her hu*****and is another "transporter".