Question is not that whether she is in trouble or not... question is She wants her parents to visit her on visitor visa....
On the base of too many previous experiences, the american consulate will have an excuse to reject her parents, just because she dont have a valid visas.....
Still you may go ahead and try apply but...75% depending on luck...
The visa is the U.S. government’s authorization allowing someone to make an application to enter the USA. It is important to realize that a form I-797 approval notice and a visa are not the same thing. Many times individuals think that they have a visa because they have the I-797 approval notice but that is generally not true. An I-797 notice without a visa will generally only allow someone to stay in the US if they are here already, but will not entitle someone to get back into the United States.