Married couples are not required to be living together to convince an IO of their "genuine" relationship. Considering the fact that he is restricted by Immigration Canada to living in one particular city because of his work permit, and she has a home and a business in another . . . as long as there is evidence of a continuing relationship, time spent together that's consistent with what would be reasonable for a couple living 6 hours apart, and all the evidences of phone calls, emails, chats, etc., it should be no different than assessing any other married couple - no matter how far apart they are.