My MiL thought that it would be a good idea if I wrote down all the reasons that we've been claiming that she's waiting to show up.
- She was waiting for G.'s best friend.
- She was waiting for both her Grandmothers to be here.
- She was waiting for G. to finish the proofreading for his book.
- She's waiting for her great-grandfather's birthday.
- (eta) She's waiting to be an Obama baby.
More as warranted.