If that dedication does refer to her, it makes me feel a bit sad on her behalf.
My first book was dedicated to a relative whom I was really close to growing up and who died far too young. My second book was dedicated to my parents and my third to one of my best friends. It was a tough choice for the third book, because I have a list as long as my arm of terrific people I want to show special appreciation for. I'm wondering how lonely you have to be to dedicate your own book to yourself. Don't get me wrong, I'm all for celebrating your achievements and I don't see any purpose in false modesty, but this doesn't look like self-confidence to me. It looks like someone who is pretty disconnected from others.