Hi
Hi,
She can apply for a visit visa even if her sponsorship application is in proces.
For the faster processing option, check the estimated times to process the cases from inside and outside canada at
www.cic.gc.caHTH
Note there is no in-canada sponsorship for parents, she would have to be sponsored under H.& C. It is quite unlikely that she would be allowed to remain in Canada as a visitor for the 4-5 years that the application would take.
PMM
PMM