Ok good, I was hoping there was enough "LAWL y U put windrrZ on yer Mackbook??" posts though no one asked for such 🙄
OP that wouldn't be a good idea. Even if you don't need to use it, you need OS X on it to do firmware updates and also to recreate the bootcamp partition if something ever happened to your hard disk. If you install Windows on it and set it as the default partition to boot from, it'll be pretty much transparent to your mom unless she messes around in the control panel and starts playing with the boot camp preferences.