They will ask the purpose of her trip and how long she is staying. If she answers appropriately there should be no problem.
The above is intended only as general information, and does not constitute legal advice. You must speak with an attorney to discuss your individual case.
I agree, she should have no trouble if she is really just visiting, and has reasons to return to her country that she can explain. Some officers will question her about the previous denials. She should be ready... and she should know everything about your status. Good luck.
This is general advice, and does not constitute an attorney client relationship.