Their presumption is so wrong, very optimistic in fact.
Looking at Mourao's results, she is way above the maximum of 100 FIS points which are required for "A" standard. This basically means that, as of today, Brazil will only be allowed to send one female racer who will be allowed to start in only one race (either 10km free or sprint classic).
To get an "A" standard her average of distance FIS points has to be under 100. And having one "A" standard does not guarantee the second quota. "A" standard merely allows the racer to start in all of the individual events. Having two athletes requires both of them having an "A" standard AND one of them being inside the top 300 on the Olympic FIS points list (distance or sprint).
If the rules were as generous as Brazilians think, then even the exotic likes of Mongolia and Iran would be able to have two female racers.