I know how scary this is - my mother also had seizures and a brain tumor the size of the doctor's fist was found. She had surgery and had a great outcome - she was actually back to work as a hairdresser within 3 months and lived until she was in her 70's. The only lasting effect she had was that she lost her sense of smell and had to remain on anti-seizure medication.
My family will be thinking of and praying for you & your family. May God guides the surgions and hold you hands to help you through the surgery and recovery.
Wow. Loads of good vibes, gentle hugs, and anything else you need! You'll (Matt, Julia, Carter, Sierra) be in my thoughts over the next few days for sure.
My brother had a brain tumor removed a couple years ago as well--it's a scary thing for everyone to go through, but his surgery and recovery went fine, as I'm sure will be the case for you!
((((((((((((((((((((((HUGS))))))))))))))))))) and }}}}}}}}}}}}}}}}VIBES{{{{{{{{{{{{{{{{{{ from all of us here. We love you Nilly and we hope you're doing just fine.
<3