If she has been with you this entire time living out of Canada, then yes, she will qualify to renew her PR card. She can not do this however until you are back in Canada. You should use the visa exempt passport to enter Canada, if they ask, show them the expired PR card and inform them that you have been living as a family outside of Canada since 2008 and were unable to renew her PR card due to that fact. Because you are a citizen all should be fine and there should be minimal hassle. Once back inside Canada, get all the documentation you need to prove you were together outside of Canada together this entire time and apply for her new PR card.
Good luck.