As far as I know, TRV applications in Canada are reserved for those with work or study permits. Not sure about super visas. Answer the questionnaire to guide you further:
http://www.cic.gc.ca/ctc-vac/getting-started.asp
If she is already in Canada, then she'll have to apply for an extension of stay. Applying for a super visa now won't allow her to stay for longer than 6 months.