I have had 3 grand mal seizures and continued simple focal or partial seizures too. I will be on seizure meds for life. Seizure meds and seizures can be quite tiring in themselves. But, they also say it takes a good year to fully recover after surgery...than you add treatment on top of it. It all takes time. Find things she likes to do and can be passionate about.
My tumor started as a grade 2 but progressed to grade 3. I was able to work full time thru the Temodar treatment and part time with CCNU treatment.
I understand you are scared but there are so many amazing treatment breakthroughs coming out now and in the near future that you really should remain hopeful. Is she being treated at a major Cancer center?? Never be afraid to get a second or third opinion. I am treated at Mayo Clinic in MN.