Utilities, property taxes, and homeowner's insurance won't change much. Housing is a critical expense. She will need nearly as much living space as before. That may mean moving to a smaller or less desirable home. Some expenses will go up.
Medical insurance is one potential problem.
She could lose coverage through her husband's plan at work. Even if he's responsible for the boys, Starting Over will need insurance for herself. Once a budget is roughed out, Starting Over will have a clearer picture. Like the rest of us, she'll need to keep expenses under income. If she doesn't she'll quickly consume the settlement.