Yes, it means her husband's income is too high to qualify for the scholarship.
Scholarships exist with all kinds of conditions. They are not just for those students who get the best grades or highest test scores.
Most colleges are very, very expensive. So the schools must provide financial assistance to those whose families can not afford to pay for the school. That means that there are income limits.
There are other scholarships that may not be tied to income. And there can be private scholarships that have any number of conditions.
Student or Learner