I would just like to add to the opinion of those above: conjugal will not work. Do not even bother considering it - it would be a waste of time and money.
You have to have real barriers to living with each other or for getting married. Her parents thinking it would be better not to get married right away is not sufficient. Her having to break a contract is not sufficient - and BTW breaking a contract is not actually against the law: contracts have penalties in them which come into play if one side breaks the contract. For example, she would have to pay back the money already spent on her education in Canada. However, she would not be arrested. She just would have to pay the penalty. The kind of barrier that CIC would consider sufficient is something like a gay couple in a country where homosexuality is illegal, and where the foreigner cannot get a visa to come to Canada to get married here. CIC considers not wanting to get married or live together because of work or school to be insufficient for a conjugal application.
Applying outland would be much faster than inland for someone from Brazil. The easiest thing would be to get married, then apply.