She wasn't undead! Besides, things like vampires don't even exist for real. They're just like, stuff people write about to make a good horror film. Where are you from anyway that you don't even know how dumb it is to think someone old is automatically a zombie?

Plus she was outside like, all the time in the sun and everything and I heard vampires are supposed to be attractive and she wasn't attractive at all. I think she might have even been religious too and that's kind of weird for a vampire. She was too fat to be a skeleton. And I found out she used to teach at my school and she wrote this book on time travel, so she couldn't have been a zombie because she was too smart. You see where there's like, a lot of flaws in your idea? Not to mention it's just illogical to call someone "grandma" if they're undead unless you're related to them.