One of my geese last year lost her three week-old goslings (actually, she lost two, then I took the third one away before it died. Wasn´t her fault, the gander kept taking them to his favourite goose that was sitting and they got separated from their mom one night and died in the cold.)
Now, this goose that lost her babies wandered around a bit lost for a few days, sticking close to the gander and the female on eggs, then after about a week she started mating again and raised a good batch.
So, with yours, I suppose, it´s as if she lost her brood, and after a bit will just get on with life......