Yada, yada and then I wrote the book

Back in the summer, I mentioned to my Grandmother that I would like to write her life story.  At the time, she didn't seem too keen on the idea.  In fact, she seemed pretty set against it.  I thought I would have to employ some subterfuge and get the story on the sly.  Well, apparently she changed her mind and happened to mention to my Mom, who mentioned it to me.  We're starting this Saturday.  So tonight I sat down to get a few questions on paper (I don't want to miss anything) and I realized--this is huge.  I thought it up and started the ball rolling without thinking about what it means be in charge of someone's story.  At 91 years, it's a quite a story.  It's kinda of like my brain went "I'll write my Grandmother's life story.  Yada yada yada, and voila! The memoir is written. See?  It will be easy."  This is the same brain that likes shiny objects and yarn fumes.  There is a chance I may be in over my head (Shocking, yes?).