Glioblastoma is a cruel quick cancer. We dealt with it in the family about 10 years ago now. Grandpa got lost going to the store. Did a brain scan. They opted for surgery and he was gone about 3 weeks after attempting to remove it all. There were signs sure, everyone just assumed the memory issues were alzheimers or dementia though.
There really wasn't any signs here, and she's doing well otherwise. I'm guessing, however, that this is going to happen more and more frequently.
Yeah, this is a hard time man. Stay strong and lean on hospice services whenever you need to.