Okay, FINALLY I got to the point where I could reserve her copy of Win10. Now I guess I just wait until she gets the notice that it's ready to install. Which of course means I will have to keep checking her email since she never does...
I never received any notice for my main PC. I just happened to go into Windows Update to see if there were any patches to apply and it said Win10 was downloaded and ready to install. That was 3 days ago and I still haven't received any notice. The Windows 10 icon in the system tray still says the download is "in progress", even though Windows Update has said it was downloaded and ready to install for 3 days...