We used to live in Real Cariari (across from Mall Cariari)
Right now we are staying in her mother's house in Cartago.
My wife already has a multiple TRV valid until 2018 which was issued to her before we applied for PR. So in theory she should be able to enter/exit Canada.. and we'll put that theory to the test. I'll report the results hopefully with a good news.
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EDIT:/UPDATE
I contacted the Mexico Office via the web site but the confirmation message bellow isn't very encouraging either. I sort of understand that with all the enquiries they probably get:
Case Specific Enquiry
Your enquiry has been sent to the visa office processing your application. You should receive a reply within 28 working days (by email, regular mail or fax).
If your application is within normal processing times you may not receive a reply from the visa office.
If your message contains new information for your application (e.g. adding a newborn or change of address) your file will be updated but the visa office may not respond to your email.