Her mother may be committing a crime if she tries to keep her daughter and the child out of the home.
You don't say what town she is in but since you're in Statesboro call these agencies to hook her up with counseling, help and assistance:
Crisis Pregnancy Center of Statesboro
204 North College Street
Statesboro, GA 30458
The Living Vine
A Christian Home for Unwed Mothers
535 East 54th Street
P.O. Box 16932
Savannah, GA 31405
44 B Lee Blvd.
Savannah, GA 31405
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Normally I would say she needs to talk to a lawyer, but given her age I know that paying for one is probably not an option. She should follow the previous advice and contact local agencies that can help her both with legal issues and support after the child is born.