There is no doubt - you are empirically wrong. Portuguese is not a 'VERY hard' language to learn. That isn't up for debate; some may struggle learning languages more than others but that doesn't mean Portuguese is 'VERY hard', especially for someone already very familiar with the phonetic alphabet and western speech patterns. And learning it certainly does not make you forget how to speak your native tongue after spending a very limited time in a submersive environment. You keep acting as if English is not the language she has learned from birth and still speaks regularly, and that she doesn't still spend considerable time in an English speaking country. And you can attempt to nurse your ego by bragging about your income, but not only is it immaterial to the facts at hand, but you are not the only one on the forum making such an income and it gives you even less credibility that you felt the need bring it up.