She needs to increase the doses of her premeal insulin and also basal insulin gradually to bring down the blood sugars within acceptable limits
Next Steps
Do your blood sugars daily both fasting and post meals 2hrs and gradually increase the dose of premeal insulin by 2 units if post meal blood sugars are high and basal insulin if fasting blood sugars are high this also by 2 units until the blood sugars normalise,
Best would be that you consult you local doctor regularly he would be your best guide.